An update on Mac support for Guild Wars 2. In 2018, Apple ended support for the OpenGL graphics technology that Guild Wars 2 uses on the Mac. Starting February 18 , we will be discontinuing support for the Mac OS version of Guild Wars 2. This means the Mac client will no longer work after this date. We will also be turning off Gem purchases in the Mac version of the game beginning on January 19, the date of our next build in the new year.
https://en-forum.guildwars2.com/discussion/121605/an-update-on-mac-support-for-guild-wars-2