I am running a MacBook Air mid 2013, i5 1.3 Ghz 2core, 4GB RAM, 500 GB ssd The machine is eligible to run Big Sur and I upgraded from Mojave to Big Sur. But...!! The performance went through the bottom. I can't work with this any more and I have to scale down to Mojave again However that platform is also not the fastest in the world. Could any one advise me please, other than scale back?
