You can make a difference in the Apple Support Community!

When you sign up with your Apple Account, you can provide valuable feedback to other community members by upvoting helpful replies and User Tips.

Looks like no one’s replied in a while. To start the conversation again, simply ask a new question.

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

124,343 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/

View in context

Dual Boot on iMac with Mojave/Catalina

Similar questions