Same here. Since the last big update gw2 crashes very soon (after 10 min or max 2 hours) with of some “lock”-error. If there are many gates nearby it crashes very fast max. 10-40 secs. I have to run out the scene, if i dont want that crash.
There is no other program (app) running !!….
iMac 27", Late 2013
3,5 GHz Intel Core i7
32 GB 1600 MHz DDR3
NVIDIA GeForce GTX 780M 4096 MB
OS X 10.9.5 (13F34)