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Apple Computing Products:
macOS - Operating System
Upgrade to Catalina and external hard drives.
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<blockquote data-quote="krs" data-source="post: 1865661" data-attributes="member: 67742"><p>No, Time Machine is great if you deleted or changed a file and need to go back to the older version.</p><p>But if your main drive crashes or becomes unreadable for some reason, it becomes a bit awkward to recover.</p><p>For one, you have to have a replacement drive (orwait until you get one) and then download or recover the macOS and all the data.</p><p></p><p>What I was getting at is to make a clone of your Mojave boot drive using an external drive and either SuperDuper (SD) or CarbonCopyCloner.(CCC)</p><p>That should be done anyway (also with Catalina) as a backup that yuou can use immediately if needed (ie main drive crashes).</p><p>Once you have a clone of your nternal Mojave drive on the external - you can check it by booting up on the external (hold down the option key while booting to bring up all bootable drives).</p><p>If all looks good, upgrade to Catalina on your internal drive.</p><p>Should something then not work to your safisfaction, you can always use the SD or CCC cloning software to clone Mojave from the external drive back to your internal drive and you are back where you started from - running Mojave.</p><p></p><p>I have done that with all my previous macOS upgrades - not with Catalina however, but there is no reason why that should work any different.</p><p>I decided Catalina is of no benefit to me at this time so I'm just going to stay on Mojave for now.</p></blockquote><p></p>
[QUOTE="krs, post: 1865661, member: 67742"] No, Time Machine is great if you deleted or changed a file and need to go back to the older version. But if your main drive crashes or becomes unreadable for some reason, it becomes a bit awkward to recover. For one, you have to have a replacement drive (orwait until you get one) and then download or recover the macOS and all the data. What I was getting at is to make a clone of your Mojave boot drive using an external drive and either SuperDuper (SD) or CarbonCopyCloner.(CCC) That should be done anyway (also with Catalina) as a backup that yuou can use immediately if needed (ie main drive crashes). Once you have a clone of your nternal Mojave drive on the external - you can check it by booting up on the external (hold down the option key while booting to bring up all bootable drives). If all looks good, upgrade to Catalina on your internal drive. Should something then not work to your safisfaction, you can always use the SD or CCC cloning software to clone Mojave from the external drive back to your internal drive and you are back where you started from - running Mojave. I have done that with all my previous macOS upgrades - not with Catalina however, but there is no reason why that should work any different. I decided Catalina is of no benefit to me at this time so I'm just going to stay on Mojave for now. [/QUOTE]
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Apple Computing Products:
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Upgrade to Catalina and external hard drives.
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