If your Mac was manufactured in 2012 or earlier, you’ll likely need to make some hardware upgrades to ensure a smooth experience with macOS Sonoma. Specifically, you should aim for at least 8GB of RAM ...

It's easy to make boot disks on old Macs for older hardware, but as the years have gone on, it's gotten a little more difficult. Here's how to make classic Mac OS 9 and early Mac OS X boot media on ...

macOS Monterey version 12 is a stable, lightweight upgrade that works great on older Macs, and you can use the direct DMG or ISO links to download, install, upgrade, or downgrade your system easily.