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jsuomala Author

Level 1

4 points

how do i update my mac from mac OS 10.12.6 to 10.13

Computer is 2015 vintage

iMac 21.5″, macOS 10.12

Posted on Oct 17, 2024 7:49 AM

Top-ranking reply

Matti Haveri

Level 7

22,314 points

Posted on Oct 17, 2024 8:19 AM

Backup and clone the working boot disk or whatever boot disk to an external volume and verify you can boot to it. Just in case you do not get stranded without a boot volume.

Then download High Sierra and make a macOS install thumb drive from it:

How to download and install macOS - Apple Support

Create a bootable installer for macOS - Apple Support

Or Option-Command-R boot into Internet Recovery mode and use this workaround to install High Sierra:

https://mrmacintosh.com/how-to-fix-the-recovery-server-could-not-be-contacted-error-high-sierra-recovery-is-still-online-but-broken/

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how do i update my mac from mac OS 10.12.6 to 10.13

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