I've recently bought a 2012 Mac mini quad-core running Catalina to go alongside a 2009 running Mojave. My Apple Bluetooth wireless keyboard, bought in 2014, which still works faultlessly under Mojave, doesn't work properly under Catalina.
It frequently drops the connection for short periods and when it's connected it'll suddenly decide not to respond for a couple of seconds after you start typing, and then you get repeated keypresses and all sorts. My Bluetooth mouse still works fine.
So I thought I'd try a brand-new third-party wireless keyboard with a USB receiver under Catalina - and it's got *exactly* the same problems, minus the on-screen "connection lost/connected" graphics. It's hugely frustrating, as the physical layout of the system (it's being used as an HTPC) means a wired keyboard is very inconvenient.
Googling around, there seems to be an undercurrent of wireless keyboards being fine under Catalina until a security update suddenly borked a great many of them?
It frequently drops the connection for short periods and when it's connected it'll suddenly decide not to respond for a couple of seconds after you start typing, and then you get repeated keypresses and all sorts. My Bluetooth mouse still works fine.
So I thought I'd try a brand-new third-party wireless keyboard with a USB receiver under Catalina - and it's got *exactly* the same problems, minus the on-screen "connection lost/connected" graphics. It's hugely frustrating, as the physical layout of the system (it's being used as an HTPC) means a wired keyboard is very inconvenient.
Googling around, there seems to be an undercurrent of wireless keyboards being fine under Catalina until a security update suddenly borked a great many of them?