I have a 2017 21" iMac with rotating hard drive. Currently I am running Mojave. Up until a few weeks ago, when I read Glenn’s great article about how he rescued his similar iMac by using an external SSD for his boot drive, I hated my iMac. Now it is so responsive that I am considering updating to Big Sur. (Thanks Glenn!)
However, after reading a lot of related TidBITS items I am concerned about this plan.
Naturally I will want to NOT use the internal, rotating hard drive.
I will want to use the External SSD as the Boot drive and for it to have all the invisible partitions that Apple creates as part of moving beyond Mojave. I don’t want to use that mall-performing internal HD for anything!
Is there experience with using an external SSD drive for Big Sur? Is it good experience? Or should I plan on staying a Mojave for the future?
I have already resigned myself that I will no longer be able to create Bootable Clones once I move from Mojave
Thanks in advance for your information