![]() If it's a hard drive, forget about ever getting that thing to run very well. Is the internal drive a platter-based hard drive or is it an SSD? An app that needs an update / reinstall? A memory hog, thermals, etc If you clarify the problem, the cause may not be the OS at all but something else. Is it slower transcoding 4K video? Is is slower loading websites? Is it slower copying 2000 jpegs from USB disk to system disk? Perhaps you should clearly define what "slow" is. You can't downgrade - it's a re-install so make sure to back up your data. No direct downgrade to Catalina from Big Sur. Was ExFAT originally.īoth Carbon Copy Cloner and SuperDuper are trial versions. I used Disk Utility to format my external Hard Disk to APFS. After 6 hours It was still at the format disk stage. CCC finished the job in over 1 hour.ĭoesn't SuperDuper work with Big Sur? I left the App running for at least 6 hours. I tried SuperDuper as I had it for years. A relative of mine without backing up first, upgraded Catalina to Big Sur and now finds it slow and wants to downgrade to Catalina. Cannot upgrade the RAM and storage as it's soldered on. I was given a Mac mini (2014) with 4GB RAM and 500GB of storage.
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