I want to install Mojave on an external hard drive and use it as the startup disk for a 2009 iMac with a bad internal drive. How do I install an OS on the external drive so I can use it as the startup drive?

I want to install Mojave on an external hard drive and use it as the startup disk for a 2009 iMac with a bad internal drive. How do I install an OS on the external drive so I can use it as the startup drive?

iMac

Posted on Sep 22, 2022 04:49 PM

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Question marked as Top-ranking reply

Posted on Sep 26, 2022 01:22 PM

Ah, Apple makes it crazy hard to post a query where you want it, yours was posted in Mojave forum.


Should not be a problem, put the Installer on , boot with Option key held down to choose the Installer...


How to create a bootable installer for macOS - Apple Support


https://itunes.apple.com/us/app/macos-sierra/id1127487414?ls=1&mt=12

Fix for 10.12 createinstallmedia "not a v… - Apple Community

Fix for 10.12 createinstallmedia "not a v… - Apple Community


3 replies
Question marked as Top-ranking reply

Sep 26, 2022 01:22 PM in response to MacWasOnceGreat

Ah, Apple makes it crazy hard to post a query where you want it, yours was posted in Mojave forum.


Should not be a problem, put the Installer on , boot with Option key held down to choose the Installer...


How to create a bootable installer for macOS - Apple Support


https://itunes.apple.com/us/app/macos-sierra/id1127487414?ls=1&mt=12

Fix for 10.12 createinstallmedia "not a v… - Apple Community

Fix for 10.12 createinstallmedia "not a v… - Apple Community


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I want to install Mojave on an external hard drive and use it as the startup disk for a 2009 iMac with a bad internal drive. How do I install an OS on the external drive so I can use it as the startup drive?

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