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Apple Computing Products:
macOS - Operating System
Update to Catalina from High Sierra.
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<blockquote data-quote="Rod" data-source="post: 1880600" data-attributes="member: 204485"><p>Another common issue is users who upgrade their macOS then decide they want to go back to the previous version. I usually don't advise this, sooner or later you have to upgrade but because Apple does not allow retrograde upgrades and tends to remove the previous macOS from the App Store after a new one is released this can cause a real problem. The only way to Install a previous macOS is to erase your Macintosh HD first.</p><p>Yes, the Restore Partition offers some solutions, but for older devices it can be problematic.</p><p>A recent post from a user is another example; he did not import his user account correctly at the setup of a new device. This resulted it two users both with the same name and all of his "Home" data on the second account. Really the only solution was to start again.</p><p>So any situation where erasing and reinstalling the previous or even current macOS again requires a bootable source and this is where the bootable thumb drive installer can save your bacon.</p><p>Lastly as a precaution you don't even need to make the bootable installer immediately, you can just make a copy of the installer to an external HD. So long as you have a copy you can make a bootable installer any time on any compatible device. I usually quit the macOS installer once it's downloaded, update my CCC clone (with safety net on) and that makes a copy of my HD prior to the upgrade (a good idea anyway) and a copy of the installer too.</p></blockquote><p></p>
[QUOTE="Rod, post: 1880600, member: 204485"] Another common issue is users who upgrade their macOS then decide they want to go back to the previous version. I usually don't advise this, sooner or later you have to upgrade but because Apple does not allow retrograde upgrades and tends to remove the previous macOS from the App Store after a new one is released this can cause a real problem. The only way to Install a previous macOS is to erase your Macintosh HD first. Yes, the Restore Partition offers some solutions, but for older devices it can be problematic. A recent post from a user is another example; he did not import his user account correctly at the setup of a new device. This resulted it two users both with the same name and all of his "Home" data on the second account. Really the only solution was to start again. So any situation where erasing and reinstalling the previous or even current macOS again requires a bootable source and this is where the bootable thumb drive installer can save your bacon. Lastly as a precaution you don't even need to make the bootable installer immediately, you can just make a copy of the installer to an external HD. So long as you have a copy you can make a bootable installer any time on any compatible device. I usually quit the macOS installer once it's downloaded, update my CCC clone (with safety net on) and that makes a copy of my HD prior to the upgrade (a good idea anyway) and a copy of the installer too. [/QUOTE]
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Apple Computing Products:
macOS - Operating System
Update to Catalina from High Sierra.
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