No Disk image mounter since upgrading to Monterey -can't open or unpack .DMG files

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Level 1

10 points

No Disk image mounter since upgrading to Monterey -can't open or unpack .DMG files

Just downloaded and installed Monterey. A short while later I download a free trial of Logic Pro after the Monterey upgrade and clicking on the downloaded DMG file does not open the disk image mounter. The DMG icon 'blinks' like it's going to open but nothing happens. I've tried restarting the computer, didn't change anything. I tried clicking while holding 'control' to use the 'open with > DiskImageMounter' and nothing happened.

I tried this with a couple of other DMG downloads and got the same results so that rules out the Logic Pro DMG being corrupt or otherwise no good.

Any idea how I can fix this?

Thanks.

Mac Pro, macOS 12.1

Posted on Dec 21, 2021 11:11 AM

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Answer 1

Old Toad

Level 10

215,196 points

Dec 22, 2021 9:55 AM in response to Bhowland

Regarding the DMG issue bring up the Info pane for a DMG file and make sure it's set to be opened by DiskImageMounter.app:

If it isn't then set it to be. DiskImageMounter is located in in your Mac HD/System/Library/CoreServices folder:

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Answer 2

Bhowland Author

Level 1

10 points

Dec 21, 2021 2:14 PM in response to Old Toad

Now I have the problem of having a bluetooth keyboard that when I restart computer, it loses bluetooth connection which means holding the shift key down does not get me booted up into safe mode...ugh.

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Answer 3

Old Toad

Level 10

215,196 points

Dec 21, 2021 2:06 PM in response to Bhowland

Yes. Booting into Safe Mode does the following;

• Verifies your startup disk and attempts to repair directory issues, if needed

• Loads only required kernel extensions (prevents 3rd party kernel/extensions from loading)

• Prevents Startup Items and Login Items from opening automatically

• Disables user-installed fonts

• Deletes font caches, kernel cache, and other system cache files

So try opening a dmg file in Safe Mode and then again after a normal reboot.

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Answer 4

Bhowland Author

Level 1

10 points

Dec 21, 2021 2:49 PM in response to Old Toad

Found a USB keyboard and was able to boot up in safe mode. Double clicked the DMG file and I DID get the PKG file. Figured that was good enough and I could install the program contained in the PKG file when back in normal mode so rebooted in normal mode and the PKG file was gone and I STILL cant get the DMG to do anything.

Should I go ahead and install the program contained in the PKG file while still in safe mode THEN go back into normal mode? I appreciate the help from you folks.

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Answer 5

Bhowland Author

Level 1

10 points

Dec 21, 2021 3:41 PM in response to Old Toad

I got my software installed while in safe mode, rebooted in normal and it's still accessible...all looks good. I STILL can't open a DMG in normal mode though. Also, about 75% of the time between when I said "on it now" and typing this message, was spent trying to reconnect my bluetooth keyboard. Clicking the bluetooth icon in Sytsem Preferences gives me an error message -"Preference Error -Could not load bluetooth pane". Something stinks with this Monterey upgrade for me as of now.

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