This is actually quite easy. Dell Latitude, HP EliteBook or Lenovo ThinkPad. All work well with Linux and have good support and/or can be purchased with additi

This is actually quite easy. Dell Latitude, HP EliteBook or Lenovo ThinkPad. All work well with Linux and have good support and/or can be purchased with additional warranty. Don't expect a 1:1 MacBook replacement though. Keyboards and touchpads are good these days, but battery life is worse and resolutions higher than 1920x1080 are rare.