How do I downgrade MacBook to Catalina from Big Sur.
I’ve got an older refurbished MacBook with SSD it was sold with Catalina but I upgraded to Big Sur and it’s slowed it down really badly takes ages to startup I can’t use Logic Pro it won’t even play two notes I bought the MacBook to use Logic. I tried downloading Catalina but it’s says the copy is too old. How can I get back to Catalina? Thanks.
Earlier Mac models