Is macOS X too old to update?

Apple said that would run happily on a late 2009 or later MacBook or iMac, or a 2010 or later MacBook Air, MacBook Pro, Mac mini or Mac Pro. … This means that if your Mac is older than 2012 it won’t officially be able to run Catalina or Mojave.

Can macOS X be upgraded?

Use Software Update to update or upgrade macOS, including built-in apps like Safari. From the Apple menu  in the corner of your screen, choose System Preferences. Click Software Update.