Quote:
Originally Posted by Speed11
Hi... I'm running Calibre 3.48 on my Mac running OS X El Capitsn version 10:11.6 and it works just fine. I've downloaded and tried to install all the 4 versions up to 4.2 and the dmg's won't open. Does anyone know what is going on? Thanks!
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You need OS X 10.14 or later to run Calibre 4.x.