Intel is the manufacturer and designor of CPUs that are used in many Mac machines. This tag only should be used when behviour differs from other CPU families e.g. Arm and PPC
Intel processors are used in Apple Mac machines starting in January 2006, for all machined from December 2006 until some machines started using Arm processors in November 2020
Intel processors are supported in OSX/macOS from Tiger 10.4.4 to the present day.
The last version of OSX to support 32 bit Intel processors was Mojave 10.14
Most dates and version numbers taken from Wikipedia