Wikipedia is using this site as the source, and that site shows around 20% market share for Mac. Linux is at 3% and ChromeOS is at 4%, so if you combine them and double that it still isn’t at 75% of the market share Mac has.
This isn’t mentioning that dealing with Linux compatibility is more annoying than Mac or Windows compatibility. Macs are very uniform, Windows has a giant making sure everything is compatible, and Linux has 900 distros that will never agree to co-operate.
You are changing the question to “is a perfect replica of a person considered the same person or not?”. That is not the question.
What you experience by using a teleporter is you enter a room, and then you die. End of story. There being another replica of you somewhere does not change that you died. For an outsider they may argue whether or not you died, whether or not the replica is you, and so on. But from the perspective of someone who enters the teleportation room, it’s over. Dead.