Comment: If you're looking for a safe

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In reply to comment: Currently living in a Mac world (see in situ)

If you're looking for a safe

If you're looking for a safe bet, Ubuntu would be fine. Ubuntu has matured quite a bit, and it will work on most modern computers. Ubuntu actually switched up their interface to be a lot more like the traditional Mac OS interface.

Otherwise you could try OpenSUSE or Fedora. It's really best to just burn a bunch of Live Disks and see which one you like.