Hello.

Is it me or does mac OS Big Sur v11.4's Archive Utility app cannot
extract *.7z files correctly?

I got a huge 141 MB 7z file (can't share it to the public) with a WAV
file inside. It was extracted without errors, but none of the players
(Windows' and third parties too) could play this 250 MB WAV file after
extracting it. I tried The Unarchiver app to extract the same 7z file's
WAV file and play it. No problems. What the heck?

According to file command, it says "... 7-zip archive data, version
0.4". Does Big Sur v11.4's Archive Utility app have issues with *.7z
files? :/

Thank you for reading and hopefully answering soon. :)
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In message <LM-dnTuJjcv4-S39nZ2dnUU7-T1QAAAA@earthlink.com> Ant <ant@zimage.comANT> wrote:
> Hello.

> Is it me or does mac OS Big Sur v11.4's Archive Utility app cannot
> extract *.7z files correctly?

Why would you think that 7z files can be extracted by the mac's archive
utility?

> I got a huge 141 MB 7z

Huge? ahahaha, nice one. I have 7z files that are multiple GB.

> file (can't share it to the public) with a WAV
> file inside. It was extracted without errors, but none of the players
> (Windows' and third parties too) could play this 250 MB WAV file after
> extracting it. I tried The Unarchiver app to extract the same 7z file's
> WAV file and play it. No problems. What the heck?

> According to file command, it says "... 7-zip archive data, version
> 0.4". Does Big Sur v11.4's Archive Utility app have issues with *.7z
> files? :/

Again, why would you think it would work? 8z is a relatively minor niche
format for archives, and there are tools to uncompress 7z files,
including The Unarchiver and p7zip (available via homebrew) as well as
direct download from 7-zip.

<https://www.7-zip.org/download.html>

I've had The Unarchiver installed for years and it is the default
application for opening archives on my system.

--
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ones.'

On 28. May 2021 at 05:32:53 CEST, "Ant" <Ant> wrote:

> Is it me or does mac OS Big Sur v11.4's Archive Utility app cannot
> extract *.7z files correctly?
>
> I got a huge 141 MB 7z file (can't share it to the public) with a WAV
> file inside. It was extracted without errors, but none of the players
> (Windows' and third parties too) could play this 250 MB WAV file after
> extracting it. I tried The Unarchiver app to extract the same 7z file's
> WAV file and play it. No problems. What the heck?

It´s not just you. Big Surs extractor is broken. It never worked with big
archives.
I use ditto to compress big (several GB) database files as PKzip archives.
BigSur could never extract them correctly.
I use the Unarchiver, that works fine.

In comp.sys.mac.apps Lewis <g.kreme@kreme.dont-email.me> wrote:
> In message <LM-dnTuJjcv4-S39nZ2dnUU7-T1QAAAA@earthlink.com> Ant <ant@zimage.comANT> wrote:
> > Hello.

> > Is it me or does mac OS Big Sur v11.4's Archive Utility app cannot
> > extract *.7z files correctly?

> Why would you think that 7z files can be extracted by the mac's archive
> utility?

Because double clicking on it opens it.

> > I got a huge 141 MB 7z

> Huge? ahahaha, nice one. I have 7z files that are multiple GB.

> > file (can't share it to the public) with a WAV
> > file inside. It was extracted without errors, but none of the players
> > (Windows' and third parties too) could play this 250 MB WAV file after
> > extracting it. I tried The Unarchiver app to extract the same 7z file's
> > WAV file and play it. No problems. What the heck?

> > According to file command, it says "... 7-zip archive data, version
> > 0.4". Does Big Sur v11.4's Archive Utility app have issues with *.7z
> > files? :/

> Again, why would you think it would work? 8z is a relatively minor niche
> format for archives, and there are tools to uncompress 7z files,
> including The Unarchiver and p7zip (available via homebrew) as well as
> direct download from 7-zip.

> <https://www.7-zip.org/download.html>

> I've had The Unarchiver installed for years and it is the default
> application for opening archives on my system.

Then, why did Apple include its file support in Archive Utility app (/System/Library/CoreServices/Applications) for Big Sur?
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In comp.sys.mac.apps Bernd Froehlich <befr@eaglesoft.de> wrote:
> On 28. May 2021 at 05:32:53 CEST, "Ant" <Ant> wrote:

> > Is it me or does mac OS Big Sur v11.4's Archive Utility app cannot
> > extract *.7z files correctly?
> >
> > I got a huge 141 MB 7z file (can't share it to the public) with a WAV
> > file inside. It was extracted without errors, but none of the players
> > (Windows' and third parties too) could play this 250 MB WAV file after
> > extracting it. I tried The Unarchiver app to extract the same 7z file's
> > WAV file and play it. No problems. What the heck?

> It´s not just you. Big Surs extractor is broken. It never worked with big
> archives.

For all supported file formats? Wow. :(

> I use ditto to compress big (several GB) database files as PKzip archives.
> BigSur could never extract them correctly.
> I use the Unarchiver, that works fine.

Apple needs to fix this then. :(
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I was able to reproduce this by making my own 7z file from a WAV file
that I converted from a MP3 with Audacity. I uploaded it to
http://zimage.com/~ant/temp/MP3toWAVsample.7z (38.3 MB). Please try
extracting with mac OS Big Sur v11.4's Archive Utility app and playing
its WAV file.

In comp.sys.mac.apps Ant <ant@zimage.comant> wrote:
> Hello.

> Is it me or does mac OS Big Sur v11.4's Archive Utility app cannot
> extract *.7z files correctly?

> I got a huge 141 MB 7z file (can't share it to the public) with a WAV
> file inside. It was extracted without errors, but none of the players
> (Windows' and third parties too) could play this 250 MB WAV file after
> extracting it. I tried The Unarchiver app to extract the same 7z file's
> WAV file and play it. No problems. What the heck?

> According to file command, it says "... 7-zip archive data, version
> 0.4". Does Big Sur v11.4's Archive Utility app have issues with *.7z
> files? :/

> Thank you for reading and hopefully answering soon. :)

--
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On 2021-05-28, Lewis <g.kreme@kreme.dont-email.me> wrote:
> In message <LM-dnTuJjcv4-S39nZ2dnUU7-T1QAAAA@earthlink.com> Ant <ant@zimage.comANT> wrote:
>> Hello.
>
>> Is it me or does mac OS Big Sur v11.4's Archive Utility app cannot
>> extract *.7z files correctly?
>
> Why would you think that 7z files can be extracted by the mac's
> archive utility?

Archive Utility can indeed can extract most 7z files. I've done it
frequently, and just tested it out on an old MS DOS 6.22.7z archive. It
worked fine.

I suspect something is different about the way the archive Ant is having
trouble with was created

> I've had The Unarchiver installed for years and it is the default
> application for opening archives on my system.

Same, but it's not the default. I just use it as a backup for things
Archive Utility has trouble with.

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On 2021-05-28, Ant <ant@zimage.comANT> wrote:
> In comp.sys.mac.apps Bernd Froehlich <befr@eaglesoft.de> wrote:
>> On 28. May 2021 at 05:32:53 CEST, "Ant" <Ant> wrote:
>
>> > Is it me or does mac OS Big Sur v11.4's Archive Utility app cannot
>> > extract *.7z files correctly?
>> >
>> > I got a huge 141 MB 7z file (can't share it to the public) with a
>> > WAV file inside. It was extracted without errors, but none of the
>> > players (Windows' and third parties too) could play this 250 MB WAV
>> > file after extracting it. I tried The Unarchiver app to extract the
>> > same 7z file's WAV file and play it. No problems. What the heck?
>
>> It´s not just you. Big Surs extractor is broken. It never worked with
>> big archives.
>
> For all supported file formats? Wow. :(

I highly doubt that. 141 MB isn't even that big.

>> I use ditto to compress big (several GB) database files as PKzip
>> archives. BigSur could never extract them correctly. I use the
>> Unarchiver, that works fine.
>
> Apple needs to fix this then. :(

Have you notified them about it?

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On 2021-05-28, Ant <ant@zimage.comANT> wrote:
> I was able to reproduce this by making my own 7z file from a WAV file
> that I converted from a MP3 with Audacity.

What did you use to create it? Are any specific options set in that app
for 7z archives?

> I uploaded it to http://zimage.com/~ant/temp/MP3toWAVsample.7z (38.3
> MB). Please try extracting with mac OS Big Sur v11.4's Archive Utility
> app and playing its WAV file.

On both of these systems:
* macOS 10.15.7 (Catalina)
* macOS 11.2.3 (Big Sur)

Archive Utility: archive gets extracted but is not a proper WAV file and
cannot be played.

The Unarchiver: archive gets correctly extracted and can be played.

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In comp.sys.mac.software Jolly Roger <jollyroger@pobox.com> wrote:
> On 2021-05-28, Lewis <g.kreme@kreme.dont-email.me> wrote:
> > In message <LM-dnTuJjcv4-S39nZ2dnUU7-T1QAAAA@earthlink.com> Ant <ant@zimage.comANT> wrote:
> >> Hello.
> >
> >> Is it me or does mac OS Big Sur v11.4's Archive Utility app cannot
> >> extract *.7z files correctly?
> >
> > Why would you think that 7z files can be extracted by the mac's
> > archive utility?

> Archive Utility can indeed can extract most 7z files. I've done it
> frequently, and just tested it out on an old MS DOS 6.22.7z archive. It
> worked fine.

> I suspect something is different about the way the archive Ant is having
> trouble with was created

> > I've had The Unarchiver installed for years and it is the default
> > application for opening archives on my system.

> Same, but it's not the default. I just use it as a backup for things
> Archive Utility has trouble with.

What trouble did you run into with it? This was my first time from someone's
7-Zipped WAV file and then doing the same with my own WAV file.
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In comp.sys.mac.software Jolly Roger <jollyroger@pobox.com> wrote:
> On 2021-05-28, Ant <ant@zimage.comANT> wrote:
> > In comp.sys.mac.apps Bernd Froehlich <befr@eaglesoft.de> wrote:
> >> On 28. May 2021 at 05:32:53 CEST, "Ant" <Ant> wrote:
> >
> >> > Is it me or does mac OS Big Sur v11.4's Archive Utility app cannot
> >> > extract *.7z files correctly?
> >> >
> >> > I got a huge 141 MB 7z file (can't share it to the public) with a
> >> > WAV file inside. It was extracted without errors, but none of the
> >> > players (Windows' and third parties too) could play this 250 MB WAV
> >> > file after extracting it. I tried The Unarchiver app to extract the
> >> > same 7z file's WAV file and play it. No problems. What the heck?
> >
> >> It´s not just you. Big Surs extractor is broken. It never worked with
> >> big archives.
> >
> > For all supported file formats? Wow. :(

> I highly doubt that. 141 MB isn't even that big.

> >> I use ditto to compress big (several GB) database files as PKzip
> >> archives. BigSur could never extract them correctly. I use the
> >> Unarchiver, that works fine.
> >
> > Apple needs to fix this then. :(

> Have you notified them about it?

Yep. I left a feedback last night. I hope they will look and fix it. It
would be great if others ran into this too to report.

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On 2021-05-28, Ant <ant@zimage.comANT> wrote:
> In comp.sys.mac.software Jolly Roger <jollyroger@pobox.com> wrote:
>> On 2021-05-28, Lewis <g.kreme@kreme.dont-email.me> wrote:
>>> In message <LM-dnTuJjcv4-S39nZ2dnUU7-T1QAAAA@earthlink.com> Ant <ant@zimage.comANT> wrote:
>>>
>>> I've had The Unarchiver installed for years and it is the default
>>> application for opening archives on my system.
>
>> Same, but it's not the default. I just use it as a backup for things
>> Archive Utility has trouble with.
>
> What trouble did you run into with it? This was my first time from
> someone's 7-Zipped WAV file and then doing the same with my own WAV
> file.

It's been so long I don't recall. It was probably just some archive
format Apple's utility doesn't support.

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In comp.sys.mac.software Jolly Roger <jollyroger@pobox.com> wrote:
> On 2021-05-28, Ant <ant@zimage.comANT> wrote:
> > I was able to reproduce this by making my own 7z file from a WAV file
> > that I converted from a MP3 with Audacity.

> What did you use to create it? Are any specific options set in that app
> for 7z archives?

I just right click on the file in Windows Explorer and its defaults with
the 64-bit 7-Zip program from https://www.7-zip.org. I tried add to
archive manually with its options
(https://justpaste.it/img/69bd8aa11a51f92afa0b0d57ded0a00d.gif). Both
were in my over decade old, updated 64-bit W7 HPE SP1 PC.

> > I uploaded it to http://zimage.com/~ant/temp/MP3toWAVsample.7z (38.3
> > MB). Please try extracting with mac OS Big Sur v11.4's Archive Utility
> > app and playing its WAV file.

> On both of these systems:
> * macOS 10.15.7 (Catalina)
> * macOS 11.2.3 (Big Sur)

> Archive Utility: archive gets extracted but is not a proper WAV file and
> cannot be played.

> The Unarchiver: archive gets correctly extracted and can be played.

Thank you for reproducing it on your end. :) Wow, even Catalina. BTW,
how come you're not on v11.4 for Big Sur?
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In comp.sys.mac.apps Jolly Roger <jollyroger@pobox.com> wrote:
> On 2021-05-28, Ant <ant@zimage.comANT> wrote:
> > In comp.sys.mac.software Jolly Roger <jollyroger@pobox.com> wrote:
> >> On 2021-05-28, Lewis <g.kreme@kreme.dont-email.me> wrote:
> >>> In message <LM-dnTuJjcv4-S39nZ2dnUU7-T1QAAAA@earthlink.com> Ant <ant@zimage.comANT> wrote:
> >>>
> >>> I've had The Unarchiver installed for years and it is the default
> >>> application for opening archives on my system.
> >
> >> Same, but it's not the default. I just use it as a backup for things
> >> Archive Utility has trouble with.
> >
> > What trouble did you run into with it? This was my first time from
> > someone's 7-Zipped WAV file and then doing the same with my own WAV
> > file.

> It's been so long I don't recall. It was probably just some archive
> format Apple's utility doesn't support.

Ah OK. I was surprised to see Apple added support for *.7z file format
since it never had a third party archive program in this clean Big Sur
installation from the end of 2020. Also, it was a first time I had to
open one in this Mac.

https://anderegg.ca/2020/08/14/what-file-types-does-apples-archive-utility-open
was an interesting read.
https://fileinfo.com/software/apple/archive_utility doesn't even mention
..7z.
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In message <ihcee5F542tU1@mid.individual.net> Jolly Roger <jollyroger@pobox.com> wrote:
> On 2021-05-28, Lewis <g.kreme@kreme.dont-email.me> wrote:
>> In message <LM-dnTuJjcv4-S39nZ2dnUU7-T1QAAAA@earthlink.com> Ant <ant@zimage.comANT> wrote:
>>> Hello.
>>
>>> Is it me or does mac OS Big Sur v11.4's Archive Utility app cannot
>>> extract *.7z files correctly?
>>
>> Why would you think that 7z files can be extracted by the mac's
>> archive utility?

> Archive Utility can indeed can extract most 7z files.

It fails to do it often enough that it's not worth it.

> I've done it frequently, and just tested it out on an old MS DOS
> 6.22.7z archive. It worked fine.

And when it fails, it doesn’t even tell you it failed, so you have
useless files that were expanded. And if you don't check them right
away, assuming that no error means everything is good, then you can
easily end up with useless files and not archive.

And support for 8z at all is pretty recent, right? I know the Archive
Utility didn't use to support 7z files at all. But then again, it also
had issues with some zip files many years ago.

> I suspect something is different about the way the archive Ant is having
> trouble with was created

Probably, but I think there is an issue with 7z and Archive Utility too.

>> I've had The Unarchiver installed for years and it is the default
>> application for opening archives on my system.

> Same, but it's not the default. I just use it as a backup for things
> Archive Utility has trouble with.

--
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great pleasure." Clarence Darrow

On 2021-05-28, Ant <ant@zimage.comANT> wrote:
> In comp.sys.mac.software Jolly Roger <jollyroger@pobox.com> wrote:
>> On 2021-05-28, Ant <ant@zimage.comANT> wrote:
>>> I was able to reproduce this by making my own 7z file from a WAV file
>>> that I converted from a MP3 with Audacity.
>
>> What did you use to create it? Are any specific options set in that app
>> for 7z archives?
>
> I just right click on the file in Windows Explorer and its defaults with
> the 64-bit 7-Zip program from https://www.7-zip.org. I tried add to
> archive manually with its options
> (https://justpaste.it/img/69bd8aa11a51f92afa0b0d57ded0a00d.gif). Both
> were in my over decade old, updated 64-bit W7 HPE SP1 PC.

Ok, thanks.

>>> I uploaded it to http://zimage.com/~ant/temp/MP3toWAVsample.7z (38.3
>>> MB). Please try extracting with mac OS Big Sur v11.4's Archive Utility
>>> app and playing its WAV file.
>
>> On both of these systems:
>> * macOS 10.15.7 (Catalina)
>> * macOS 11.2.3 (Big Sur)
>
>> Archive Utility: archive gets extracted but is not a proper WAV file
>> and cannot be played.
>
>> The Unarchiver: archive gets correctly extracted and can be played.
>
> Thank you for reproducing it on your end. :) Wow, even Catalina. BTW,
> how come you're not on v11.4 for Big Sur?

Inertia, mostly. : ) I have several Macs of various models here at home,
and while some run Big Sir, others run Catalina, mostly because I
haven't yet taken the time to verify that all of the stuff I have
installed is fully compatible with Big Sur. As an example, one of the
headless Mac minis in my server closet is still running Catalina because
it runs several critical Docker containers that must continue running
24/7 without issue, and I haven't had time to test them in Big Sur. I'll
get around to it eventually - no rush.

--
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I often ignore posts from Google. Use a real news client instead.

JR

In comp.sys.mac.apps Lewis <g.kreme@kreme.dont-email.me> wrote:
> In message <ihcee5F542tU1@mid.individual.net> Jolly Roger <jollyroger@pobox.com> wrote:
> > On 2021-05-28, Lewis <g.kreme@kreme.dont-email.me> wrote:
> >> In message <LM-dnTuJjcv4-S39nZ2dnUU7-T1QAAAA@earthlink.com> Ant <ant@zimage.comANT> wrote:
> >>> Hello.
> >>
> >>> Is it me or does mac OS Big Sur v11.4's Archive Utility app cannot
> >>> extract *.7z files correctly?
> >>
> >> Why would you think that 7z files can be extracted by the mac's
> >> archive utility?

> > Archive Utility can indeed can extract most 7z files.

> It fails to do it often enough that it's not worth it.

> > I've done it frequently, and just tested it out on an old MS DOS
> > 6.22.7z archive. It worked fine.

> And when it fails, it doesn???t even tell you it failed, so you have
> useless files that were expanded. And if you don't check them right
> away, assuming that no error means everything is good, then you can
> easily end up with useless files and not archive.

> And support for 8z at all is pretty recent, right? I know the Archive
> Utility didn't use to support 7z files at all. But then again, it also
> had issues with some zip files many years ago.

I never had problems with zip files. What issues were there?
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In comp.sys.mac.apps Jolly Roger <jollyroger@pobox.com> wrote:
> On 2021-05-28, Ant <ant@zimage.comANT> wrote:
> > In comp.sys.mac.software Jolly Roger <jollyroger@pobox.com> wrote:
> >> On 2021-05-28, Ant <ant@zimage.comANT> wrote:
> >>> I was able to reproduce this by making my own 7z file from a WAV file
> >>> that I converted from a MP3 with Audacity.
> >
> >> What did you use to create it? Are any specific options set in that app
> >> for 7z archives?
> >
> > I just right click on the file in Windows Explorer and its defaults with
> > the 64-bit 7-Zip program from https://www.7-zip.org. I tried add to
> > archive manually with its options
> > (https://justpaste.it/img/69bd8aa11a51f92afa0b0d57ded0a00d.gif). Both
> > were in my over decade old, updated 64-bit W7 HPE SP1 PC.

> Ok, thanks.

You're welcome. Just for kicks, I made 7zip compress the same WAV file
into a zip file to retest. No problems even though bigger size.

> >>> I uploaded it to http://zimage.com/~ant/temp/MP3toWAVsample.7z (38.3
> >>> MB). Please try extracting with mac OS Big Sur v11.4's Archive Utility
> >>> app and playing its WAV file.
> >
> >> On both of these systems:
> >> * macOS 10.15.7 (Catalina)
> >> * macOS 11.2.3 (Big Sur)
> >
> >> Archive Utility: archive gets extracted but is not a proper WAV file
> >> and cannot be played.
> >
> >> The Unarchiver: archive gets correctly extracted and can be played.
> >
> > Thank you for reproducing it on your end. :) Wow, even Catalina. BTW,
> > how come you're not on v11.4 for Big Sur?

> Inertia, mostly. : ) I have several Macs of various models here at home,
> and while some run Big Sir, others run Catalina, mostly because I
> haven't yet taken the time to verify that all of the stuff I have
> installed is fully compatible with Big Sur. As an example, one of the
> headless Mac minis in my server closet is still running Catalina because
> it runs several critical Docker containers that must continue running
> 24/7 without issue, and I haven't had time to test them in Big Sur. I'll
> get around to it eventually - no rush.

Ah, understood. :)
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( )

In message <vpKdnUKI4fq13Cz9nZ2dnUU7-amdnZ2d@earthlink.com> Ant <ant@zimage.comANT> wrote:
> In comp.sys.mac.apps Lewis <g.kreme@kreme.dont-email.me> wrote:
>> In message <ihcee5F542tU1@mid.individual.net> Jolly Roger <jollyroger@pobox.com> wrote:
>> > On 2021-05-28, Lewis <g.kreme@kreme.dont-email.me> wrote:
>> >> In message <LM-dnTuJjcv4-S39nZ2dnUU7-T1QAAAA@earthlink.com> Ant <ant@zimage.comANT> wrote:
>> >>> Hello.
>> >>
>> >>> Is it me or does mac OS Big Sur v11.4's Archive Utility app cannot
>> >>> extract *.7z files correctly?
>> >>
>> >> Why would you think that 7z files can be extracted by the mac's
>> >> archive utility?

>> > Archive Utility can indeed can extract most 7z files.

>> It fails to do it often enough that it's not worth it.

>> > I've done it frequently, and just tested it out on an old MS DOS
>> > 6.22.7z archive. It worked fine.

>> And when it fails, it doesn???t even tell you it failed, so you have
>> useless files that were expanded. And if you don't check them right
>> away, assuming that no error means everything is good, then you can
>> easily end up with useless files and not archive.

>> And support for 8z at all is pretty recent, right? I know the Archive
>> Utility didn't use to support 7z files at all. But then again, it also
>> had issues with some zip files many years ago.

> I never had problems with zip files. What issues were there?

It was many years ago and I don't remember, but I do remember having to
use other tools to correctly extract some zip archives some time ago.

--
Nobody puts one over on Fred C. Dobbs.