If you have a need for a really old OS and don’t want to download and install, contact MacRecycleClinic, as we have DVDs with most of the older OS software – including some PowerPC software, and can help you with the install. Note that some of the earlier Mac OS varieties like OS 7 Lion is, for some reason, sold by Apple rather than provided for free (but keep reading – there’s a solution for that!).
Even tho Catalina is available via the App Store, we’ll include it here (as a link). Thus, we offer a list of OS downloads (from the Apple website and beyond) so that you don’t have to go looking for them. While it might seem easy to just Google your request, it’s not always that easy. At the MacRecycleClinic, we keep thumb drives and external hard drives partitioned with individual installers from Catalina on back – or even Time Machine backups (which are quicker than OS installs).
Those of us who use Macs may have need to reinstall an older version of the OS from time to time.
