I have the same problem. Sometimes it works after a few “force quits” sometimes it doesn’t. Here are a few fixes i tried and it worked:
1. Run this command, it deletes the launcher settings
“rm -rf /Users/<USERNAME_HERE>/Library/Application Support/Guild Wars 2”
2. Run this command, it starts the repair process for GW2 (i took me about 10~15 min and the launcher appeared)
“/Applications/Guild\ Wars\ 2.app/Contents/MacOS/cider —use-dos-cwd C:Gw2 -- C:\\GW2\\GW2.exe -repair”
And the only thing remaining is to wait for ANet to make us a working client, and remove the 3 year old “Beta” tag from Mac