I have an iMac 27-inch, late 2013, 16gb, 1600 MHz DDR3. Processor is 3.2 GHz Core i5. Trying to upgrade to Catalina 10.15.7 4.
can macOS Catalina 10.15.7 be installed on iMac with Mojave 10.14.6? I have 16gb. its a late 2013 27-in. Intel Core i5?
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Welcome to Apple Support Communities.
Yes, you can upgrade to macOS Catalina. Get it here: How to get old versions of macOS - Apple Support.
Make sure you have a backup first!
Jack