Part and parcel with this change is the end of any refunds for the Mac client for those who purchased it and found its performance unsatisfactory. Refunds will be offered until February 21st, so it’s important to double-check the system requirements listed to make sure that your machine can run the client properly if you’re on the fence about requesting a refund. For those who are already playing the game on either PC or PlayStation, the biggest news is the usual update procedure for tomestones in the next patch.
Source: Mac client, Tomestone shift