When purchased, my iMac came with Snow Leopard, plus installation disks, but I recently upgraded the OS to Mavericks, in order to use the latest iteration of Garageband, i.e. Garageband 10.1.
Garageband 10.1 does not run at all well, but I don't know whether it is a glitchy, buggy program, or a system wide issue on my machine causing the problem. It occurred to me I might back up the system I currently run using Time Machine to preserve data, perform a clean install, using my Snow Leopard disks, then upgrade via the App store back to Mavericks, (because Garageband 10.1 cannot run on Snow Leopard), which would effectively give me clean Mavericks installation. I would then reinstall my data from my Time Machine Back up.
Is this a sensible approach which might work? I'd appreciate any advice. Many thanks, George Bolam.