cannot open disk image - "no mountable file system"

[retroformat]

I'm stumped already! I downloaded the disk image "FreeCAD_0.19-24276-macOS-x86_64-conda.dmg" but it will not open on my iMac (Retina 5K, 27-inch, Late 2015). The computer appears to go through the entire "verification" but then instead of opening the disk image, reports that it cannot open the disk image, because "no mountable file systems."
Has anyone seen this, and how can I get around it?
thanks

[chrisb]

I have never seen this. Opening the DMG always worked. From there you drag FreeCAD to the place of your desire, usually /Applications, but sometimes it doesn't work there. For further security issues see the Known OS specific issues.

[retroformat]

I forgot to mention: I'm running under OSX 10.11.06 El Capitan
I tried downloading the DMG again (in case the first DMG was corrupted somehow), but the result was the same with the second download. These dmg files I downloaded from <https://github.com/FreeCAD/FreeCAD/rele ... -conda.dmg>

[retroformat]

[chrisb]

Perhaps the file is corrupted? It should have a size of 1026456412 bytes. If yours is smaller, it is defect, if it has the same size, we still don't know.

[tom]

The mentioned DMG file works perfectly here. Did you check the SHA256 of your downloaded file?

Code: Select all

shasum -a 256 Downloads/FreeCAD_0.19-24276-macOS-x86_64-conda.dmg
537a932257ed675fa7e8ae7637e7dc0e507bc40859b723dcfac5d2462c91bc66  Downloads/FreeCAD_0.19-24276-macOS-x86_64-conda.dmg

BR Tom

OS: macOS Mojave (10.14)
Word size of OS: 64-bit
Word size of FreeCAD: 64-bit
Version: 0.19.24276 (Git)
Build type: Release
Branch: (HEAD detached at 0.19.1)
Hash: a88db11e0a908f6e38f92bfc5187b13ebe470438
Python version: 3.8.8
Qt version: 5.12.9
Coin version: 4.0.0
OCC version: 7.4.0
Locale: C/Default (C)

[retroformat]

Hi Tom, thanks for this tip:
I gave the command in Terminal and it returned:

Macs-iMac-7:/ macuser$ shasum -a 256 /Users/macuser/Downloads/FreeCAD_0.19-24276-macOS-x86_64-conda.dmg
537a932257ed675fa7e8ae7637e7dc0e507bc40859b723dcfac5d2462c91bc66 /Users/macuser/Downloads/FreeCAD_0.19-24276-macOS-x86_64-conda.dmg

which appears to be the same checksum you have there.

I tried once more to open the .dmg, and this is what I get:

http://starosta.com/freecad-cannot-open-dmg.jpg

(I tried inserting this image in earlier message, but it does not work for some reason. SNAFUs abound!)

[retroformat]

In addition to doing the checksum, I have this information from the "get info" file metadata.

Size: 1,026,456,412 bytes (1.03 GB on disk)

Where from:
https://github-releases.githubuserconte ... tet-stream, https://www.freecadweb.org/downloads.php

[chrisb]

I can imagine some security settings. MacOS can be rather peculiar.

[chrisb]

I forgot to mention: I'm running under OSX 10.11.06 El Capitan

That could be the culprit, see point 4: https://deciphertools.com/blog/2017-10- ... e-systems/