I've got ridiculous speed problems on my vintage iMac now even after Apple assistance improved things for a couple of days so I'm thinking about a clean system install... how do I actually go about that without losing my essential files such as Mail? I'm assuming I don't have to go back to the original system disk? At the moment I'm backing-up in Time Machine.
The Time Machine backup will save everything. Below are links to the path you would take. Use the Erase option in the third link before reinstalling. Take note when reinstalling it will take a while to download the installer, it's a few gigs in size.
Great, thanks Reboot. I'm going to have to think about whether to go for a completely clean install or I might even move up to a new machine at some point so that what happens to this one will become a little less important.
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