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Review: macOS Catalina 10.15 is what Apple promised the Mac could be, and is a crucial upgrade | AppleInsider
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Apple+iMac+A1312+27+inch+%281TB%2C+Intel+Core+i5+2nd+Gen.%2C+2.7GHz%2C+4GB%29+Desktop+-+Silver+-+MC813LL%2FA for sale online | eBay
![Fix for "this version of macOS [10.15.7 or 10.14.6] cannot be installed on this computer." - YouTube Fix for "this version of macOS [10.15.7 or 10.14.6] cannot be installed on this computer." - YouTube](https://i.ytimg.com/vi/I9RNZtCKQ7o/hqdefault.jpg)
Fix for "this version of macOS [10.15.7 or 10.14.6] cannot be installed on this computer." - YouTube
![Mac OS CATALINA on a 2011 IMAC. I kept hearing it won't work because of the video card and would make my Mac unable to use but it is working for me. Mac OS CATALINA on a 2011 IMAC. I kept hearing it won't work because of the video card and would make my Mac unable to use but it is working for me.](https://i.redd.it/659ugq09ypm41.jpg)