Go through the usual steps of Installation.
No, Time Machine is great if you deleted or changed a file and need to go back to the older version.ĭownload Carbon Copy Cloner (CCC). I decided Catalina is of no benefit to me at this time so I'm just going to stay on Mojave for now. 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. 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. If all looks good, upgrade to Catalina on your internal drive. 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). That should be done anyway (also with Catalina) as a backup that yuou can use immediately if needed (ie main drive crashes). What I was getting at is to make a clone of your Mojave boot drive using an external drive and either SuperDuper (SD) or CarbonCop圜loner.(CCC) If there are any articles regarding this then I would appreciate a link to them.Ĭlick to expand.No, Time Machine is great if you deleted or changed a file and need to go back to the older version.īut if your main drive crashes or becomes unreadable for some reason, it becomes a bit awkward to recover.įor one, you have to have a replacement drive (orwait until you get one) and then download or recover the macOS and all the data. I really am scared of losing the ability to use my external drives. Will this be OK after the upgrade to Catalina? I also have a "G technology" (1 TB) SSD that is used exclusively for Time Machine. They are set up as Mac OS Extended (Journaled) with GUID partition map. spinners ) be recognised so that I can access the files after upgrading from Mojave to Catalina? This means that I have 3 copies of the files ( 1 on the first G Technology 4 TB and 2 more on the Samsung D3 6 TB drives ). I also have 2 Samsung D3 (6 TB) (spinning) drives which are copied from the above drive using Carbon Copy Cloner to give redundancy in my set up. SATA this is where all my photographic files are kept. However I have external hard drives for my photographic files used in Lightroom and Photoshop. It has a 1Tb SSD ( Macintosh HD ) internal drive so I don't think that there will be any problem there as it is already running as APFS I have a 2017 iMac 5k Retina 27” to upgrade to Catalina from Mojave.
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