Mac Question
I have also been playing on my Mac since launch and have never seen that. A quick search on that error however gave this solution from reddit:
“Do you have any Razer device? If yes, stop the process “razerstatsmanager.exe” with the task manager. This is what i have to do (but only with sweetfx or any variant installed). It worked but since a patch about a month ago it isn’t anymore."
There’s a sticky post at the top of this forum for mac, inside are instructions on how to delete the Guild Wars 2 folder in Application Support. I assume you didn’t remove that when you uninstalled GW2 the first time, so perhaps there’s some issue thats arisen from that folder being connected to the old instal..