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User profile for user: fede5
fede5 Author
User level: Level 1
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Boot from an external HD with El Capitan installed

can i boot from an external hard disk with El Capitan from an imac 2020 with a Catalina ios in order to use older software only running with El Capitan?

iMac 27″, macOS 10.15

Posted on Mar 16, 2022 6:59 AM

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User profile for user: tjk
tjk
User level: Level 9
51,142 points

Posted on Mar 16, 2022 9:29 AM

Hi,


No, the iMac will not boot from an OS older than the one it shipped with.

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Boot from an external HD with El Capitan installed

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