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Dual Boot on iMac with Mojave/Catalina

I have an iMac 27" late 2017. I would like to install both Mojave and Catalina on my Mac. Should I partition my internal Drive (it's 1 TB fusion drive) and install Catalina with a usb flash on the new partition or should I follow another method?. IMPORTANT: I don't want to break the hard disk, or delete the OS, or format anything for error... Only partition the disk and install another OS on another partition... is it a risky operation? It is secure to partition my internal drive? Thank you!

Posted on May 9, 2020 12:22 AM

Top-ranking reply

dialabrain

Level 10

125,381 points

Posted on May 9, 2020 12:27 AM

Assuming your iMac is APFS formatted, see: https://www.idownloadblog.com/2020/01/09/mojave-catalina-same-mac/

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Dual Boot on iMac with Mojave/Catalina

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