I don’t know if anyone here has an older computer, but I have a venerable and much cherished MacBook Air from mid 2011 which is about to go out of support. I have installed macOS High Sierra on it, which is the most recent OS it will run, but the last security update for what is now a three-year-old OS has just come out. I’m not yet ready to buy a new computer, and I’d like to keep this machine as my working laptop for a while yet.
So I am looking for tips how to keep this older machine secure and in working shape, and thought I’d ask to see if anyone has any advice in working with older Macs? One good tip I have had is to move from Apple’s Safari to Google Chrome, which offers an up-to-date and secure web browser even for older OS revisions.
It’s a shame that a machine which is still in good shape — I recently cleaned it, and it looks shiny and still only weighs about a kg so it’s light and is fast enough for my modest needs — is getting limited by security concerns. It wouldn’t usually be a big deal, but I do my online banking on it.