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

[Ant]

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 <a...@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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[Ant]

In comp.sys.mac.software Jolly Roger <jolly...@pobox.com> wrote:

> On 2021-05-28, Ant <a...@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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Incoming Zikron, & cleaned & upgraded PCs.

[Ant]

In comp.sys.mac.apps Jolly Roger <jolly...@pobox.com> wrote:
> On 2021-05-28, Ant <a...@zimage.comANT> wrote:
> > In comp.sys.mac.software Jolly Roger <jolly...@pobox.com> wrote:

> >> On 2021-05-28, Lewis <g.k...@kreme.dont-email.me> wrote:
> >>> In message <LM-dnTuJjcv4-S39...@earthlink.com> Ant <a...@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.

[Ant]

In comp.sys.mac.apps Lewis <g.k...@kreme.dont-email.me> wrote:

> In message <ihcee5...@mid.individual.net> Jolly Roger <jolly...@pobox.com> wrote:
> > On 2021-05-28, Lewis <g.k...@kreme.dont-email.me> wrote:
> >> In message <LM-dnTuJjcv4-S39...@earthlink.com> Ant <a...@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?

[Ant]

In comp.sys.mac.apps Jolly Roger <jolly...@pobox.com> wrote:
> On 2021-05-28, Ant <a...@zimage.comANT> wrote:
> > In comp.sys.mac.software Jolly Roger <jolly...@pobox.com> wrote:
> >> On 2021-05-28, Ant <a...@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. :)

[Lewis]

In message <vpKdnUKI4fq13Cz9...@earthlink.com> Ant <a...@zimage.comANT> wrote:
> In comp.sys.mac.apps Lewis <g.k...@kreme.dont-email.me> wrote:
>> In message <ihcee5...@mid.individual.net> Jolly Roger <jolly...@pobox.com> wrote:
>> > On 2021-05-28, Lewis <g.k...@kreme.dont-email.me> wrote:
>> >> In message <LM-dnTuJjcv4-S39...@earthlink.com> Ant <a...@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.

--
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