You cannot open disk image file (.dmg) on your Mac and get the “no mountable file systems” error message? ISumsoft BitLocker Reader for Mac can. I've tried them on a friends Mac, the same files, same operating system version, same version of hdiutil, and they mount no problem. Mac OS extended file system DMGs will mount OK on my Mac, I've not tried FAT32. Below is an example of the output from hdiutil mount MacFUSE-2.1.dmg -verbose Initializing.
Hi,
- I checked other DMG files downloaded from Internet, for example Skype-8.30.0.50.dmg. The mounting of Skype DMG worked fine. My problematic DMG file was created on Linux machine by genisoimage util and 7zip utility shows that it has ISO type, not HFS type as Skype DMG.
- If it's different, try redownloading the file. If the md5 is the same, also try following steps 2, 5, and 6, if applicable, from the guide linked to in the first post. If all of that seems to be fine, see if you can open the dmg in safe mode.
If I make a DMG on High Sierra using the Disk Utility gui, as
- Image from Folder
- Image Format: compressed
the DMG file format defaults to APFS and won't open on El Capitan (but does open on Sierra). It gives the error 'no mountable file systems.'
If I select
- Image Format: hybrid image (HFS+/ISO/UDF)
the DMG file format is Mac OS Extended and does open on El Capitan, but there is no compression.
Has anyone else seen this? Seems like yet another way to push everyone/everything to APFS.
Mac Os Dmg No Mountable File Systems
I can get El Capitan compatibility and compression by using the command line
hdiutil temp.dmg -srcfolder 'My folder' -fs HFS+
Edit: to the moderator who rejected this the first time... can you please explain why? This is developer related. I build apps and distributed them as a DMG. With the High Sierra update, the creation of DMG's (using Disk Utility) appears to have broken this method of distribution for customers on macOS prior to Sierra.
Cheers,
No Mountable File Systems Mac Dmg
Michael