Thread: Calibre 4.0 dmg won't open on my iMac
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Old 10-17-2019, 09:49 AM   #13
JSWolf
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Quote:
Originally Posted by wilfriedk View Post
Rebooting does not solve the problem.

I have a Mac mini and an iMac 5k, both with OS X 10.11.6 El Capitan. When I doubleclick on the .dmg file, I get, after a few seconds, both with 4.0.0 and 4.1.0, the message:

Keine aktivierbaren Dateisysteme (no mountable file systems)

Would appreciate any substantial help very much. Thank you.
You may be able to upgrade your iMac's if they are not officially supported if ou are willing to buy new video card(s).

http://dosdude1.com/catalina/

Go to that link and read about the MacOS Catalina Patcher.
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