[Solved] GC 12.0.6 .dmg fails to mount in Sonoma 14.0

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matti
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[Solved] GC 12.0.6 .dmg fails to mount in Sonoma 14.0

Post by matti »

GC 12.0.6 .dmg fails to mount in Sonoma 14.0 (Permission denied). A fresh download with Sonoma Safari from both GC servers fail.

Also a previously Ventura Safari GC 12.0.5 .dmg download fails to mount in Sonoma although no problem was in Ventura with that .dmg.

No problem with other .dmg images so far.
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Re: GC 12.0.6 .dmg fails to mount in Sonoma 14.0

Post by forum_adm »

I tried just a few seconds ago: Download with Safari. Mount works perfectly.

Permission denied indicates a security issue. Is the dmg in the downloads folder?
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Re: GC 12.0.6 .dmg fails to mount in Sonoma 14.0

Post by forum_adm »

Is maybe the quarantine flag set?
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Re: GC 12.0.6 .dmg fails to mount in Sonoma 14.0

Post by matti »

I used xattred.app to remove the quarantine flag and after that the .dmg mounted.

Maybe some teething issues with Sonoma 14.0? I have never needed to do this manually before. This is a clean Sonoma install and all other downloaded .dmg images have mounted OK.
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Fotokunst
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Re: GC 12.0.6 .dmg fails to mount in Sonoma 14.0

Post by Fotokunst »

I tested this too.
I see no issues.
Fortissimo
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Re: GC 12.0.6 .dmg fails to mount in Sonoma 14.0

Post by Fortissimo »

Hi,

identisches Problem. Download Safari, Sonoma 14.0 (23A344), bisher keine Problem.
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Re: GC 12.0.6 .dmg fails to mount in Sonoma 14.0

Post by forum_adm »

The screenshot shows that the macOS did not grant access.

Please try a right mouse button click and select open. The quarantine flag is set by the local machine - not the server.
matti
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Re: GC 12.0.6 .dmg fails to mount in Sonoma 14.0

Post by matti »

Most .dmg open OK in Sonoma but I noticed that a .dmg with a license agreement pop-up have the same problem. Such as:

GraphicConverter, TinkerTool, DMG Canvas:

https://www.lemkesoft.de/en/products/gr ... r/download
http://www.bresink.com/osx/0TinkerTool/download.php
https://www.araelium.com/dmgcanvas

Also Spotify installer seems to fail with a similar error "An error occurred while trying to mount the downloaded Spotify disk image".

This error is not yet widely reported so I suspect it might be caused by my setup or maybe my oldish Mac mini 2018. In macOS 13.6 Ventura those .dmg mount OK.

This is a clean macOS 14.0 Sonoma install to an external disk.

I have unsuccessfully tried to fix this by:

Safe-boot
SMC and PRAM reset
Disk First Aid in Recovery mode is OK
Disable macOS internal Firewall
Right-click > Open .dmg
In another new user account
Safari download location from ~Desktop to ~Downloads
Safari "Open safe files after downloading" from OFF to ON
Download with Firefox instead Safari
Dirty macOS 13.6 -> 14.0 upgrade on an external disk
Reinstall macOS 14.0 Sonoma on top of the old install
Download a new macOS 14.0 Sonoma installer and do another clean install to an external disk

It seems the quarantine flag is not properly cleared. A workaround that fixes this is:

xattr -d com.apple.quarantine file.dmg

But I'd rather let macOS more gracefully automatically handle this.
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Re: GC 12.0.6 .dmg fails to mount in Sonoma 14.0

Post by forum_adm »

Thanks for the hint.

I forward that details to the developer of DropDMG (the tool used for the creation).
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Re: GC 12.0.6 .dmg fails to mount in Sonoma 14.0

Post by forum_adm »

You can view the reply here:

https://forum.c-command.com/t/dmgs-with ... ns/15494/2

So, Apple fix the issue with 14.1.
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