Connie840 wrote:
I reformatted and installed Mac OS X to old iMac. Is updated to version 10.4.11 and won't update any higher. The version of Safari it is running is not loading pages, and I'm getting an error message can't establish a secure connection. I've done all the troubleshooting Apple suggests. Full internet connection. I can get on a Google homepage, I can do a Google search and when I click on the link it can't establish a connection. Trying to install google chrome, page won't load. Before I reformatted it was running OS X 10.6.8 Wondering why it won't update operating system higher?
If I remember correctly, the way that you upgraded from Tiger (10.4.*) to Leopard (10.5.*) to Snow Leopard (10.6.*) was to purchase a retail box containing the operating system on DVD. Sometimes the box might also have other packages like iTunes and iWork (Pages, Numbers, Keynote) in it.
Apple's site for obtaining old copies of macOS does not provide a way to get Snow Leopard, or anything that came before. (It also does not provide a way to get Mavericks – a curious omission.)
How to download and install macOS - Apple Support
It used to be possible to order Snow Leopard DVDs from the Apple Store, but Apple discontinued those a few years ago. Now you're lucky if you can find them on online "flea markets".