I am operating on an old version of MacOS 10.13.6. I don't see a software update on my Mac or at the Apple Store. Any suggestions?
I purchased my computer in 2017. I have am getting notices that my browser isn't supporting some of the sites I am looking at. How do I force an update on my browser when I can't find it apple, system, general, software update. I also can't find it at the Apple store. Even if I search under the general table for software update nothing come up. Any suggestions would be helpful.
iMac 21.5″, macOS 10.13