My Mac won't let me update to a newer OS. What can I do?
I purchased my Mac in 2009. Now I can't upgrade. Any help would be appreciated.
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The model and year of your Mac will determine which macOS you can upgrade to,
read the following links.
How to upgrade to macOS High Sierra - Apple Support
How to upgrade to OS X El Capitan - Apple Support
Before upgrading make a full back up of your Mac.
Check that third party apps you use have updates available for the new OS.
Check that your printers/ scanners etc have updated drivers and software available for the new OS.
