[tor-bugs] #29470 [Applications/Tor Browser]: error message torBrowser-8.0.5-osx6 No Mountable file systems

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#29470: error message torBrowser-8.0.5-osx6 No Mountable file systems
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 Reporter:  arw54                     |          Owner:  tbb-team
     Type:  defect                    |         Status:  needs_information
 Priority:  Medium                    |      Milestone:
Component:  Applications/Tor Browser  |        Version:
 Severity:  Normal                    |     Resolution:
 Keywords:                            |  Actual Points:
Parent ID:                            |         Points:
 Reviewer:                            |        Sponsor:
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Comment (by gk):

 Alright we had a user on IRC today and we looked closer at it. The .dmgs
 were not corrupted during download and, yes, as far as I understand it the
 error happens as soon as Tor Browser gets opened.

 Trying to figure something out on the commandline with `hdiutil attach
 -verbose TorBrowser-8.5.1-osx64_nl.dmg` gives:
 {{{
 Initialising…
 DIBackingStoreInstantiatorProbe: interface  0, score      100,
 CBSDBackingStore DIBackingStoreInstantiatorProbe: interface  1,
 score    -1000, CBundleBackingStore DIBackingStoreInstantiatorProbe:
 interface  2, score    -1000, CRAMBackingStore
 DIBackingStoreInstantiatorProbe: interface  3, score      100,
 CCarbonBackingStore DIBackingStoreInst
 Mounting… 2019-06-14 07:58:37.407 diskimages-helper[12882:447676]
 -remountReturningDictionary: detaching because no mountable
 filesystems. 2019-06-14 07:58:37.408 diskimages-helper[12882:447673]
 _postflightMountPointsAfterDAMount: disk6 aborting because disk
 image has no band size specified. Attaching… Error 112 (no mountable
 file systems). Finishing… DIHLDiskImageAttach() returned 112
 hdiutil: attach failed - no mountable file systems
 }}}
 Then we tried to get things running on an USB stick with minimum security
 but still no dice.
 {{{
 Use right click "Open With" - "DiskImageMounter (default) to start
 mounting dmg files. Same issue again via usb Did this action via Finder
 and PathFinder
 }}}
 Then I pointed to https://superuser.com/questions/19426/im-unable-to-
 mount-a-dmg-getting-a-no-mountable-filesystems-error
 here is what happened:
 {{{
 I first followed the lines in Terminal as follows
 `hdiutil attach -noverify -nomount TorBrowser-8.5.1-osx64_en-US.dmg`
  feedback Terminal in my case /dev/disk7
 Then I entered in Terminal diskutil list
 That shows me indeed all the drives as well as disk7
 Then Terminal command diskutil mountDisk /dev/disk7
 Feedback Terminal -> Volume(s) mounted successfully
 So it all seems OK, but it wasn't yet sine there was nothing mounted. Then
 I went to Disk Utility and follow the article to the moment ..... to this
 paragraph ->
 I ran into a similar situation. I did what simonair suggested and I
 received a message in Terminal that Volume mounted successfully. However
 It did not help me access the mounted Volume neither was I
 able to confirm the mounted Volume. Nor was I able to mount the image
 using Disk Drill or even scan through. Nothing succeeded.
 Then there's a long paragraph telling to make a new image of the Tor
 Browser which seems not to be active thus Disk Utility - File - New Image
 - Image from tor browser. I kept all default values and it was made. Only
 thing I don't understand it what the file size is now 154MB, but besides
 that ....
 I clicked the newly created tor browser and now it opened without a fault
 message
 Copied the Tor to Applications, started Tor and it works flawless
 }}}
 So, recreating the image locally seems to solve this. This is a bit
 inconvenient but looking at the StackExchange article it seems this is not
 a Tor Browser (only) issue as a bunch of different .dmg images are
 affected.

 Should we declare victory here and just add an item to our browser
 FAQs/support pages? I am not too famiilar with macOS but this seems more
 like an macOS issue to me than something to fix on our turf.

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/29470#comment:3>
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