Working on an old Macbook air
My MAC is 10 years old and I can't update to the latest OS. I am now having trouble as MS Teams - which i need to use for some work - is not updating so losing functionality. Also, every now and then my Bin says it has over 1TB of junk in it which seems to be old versions of my entire laptop from years past - but then that all disappears again. Any advice apart from buying a new one?