Linux support by manufacturers, even when it exists doesn’t really exist so don’t overstate that. How is ios related here? Should one settle for a worse laptop

Linux support by manufacturers, even when it exists doesn’t really exist so don’t overstate that. How is ios related here? Should one settle for a worse laptop based on a completely different division of said company? OSX is reasonably open and you can mostly use it as a regular linux due to its UNIX-isms.