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Setting up my new 2020 27" iMac with catalina, and am hoping to occasionally use an external SSD, a copy of my previous High Sierra iMac, so can run older programs (looking at you Adobe). Possible?
Thanks! John
No.. High Sierra nor Mojave will boot on an iMac that shipped with Catalina.
No.. High Sierra nor Mojave will boot on an iMac that shipped with Catalina.
2020 iMac: external start up with High Sierra?
