Source: http://us.battle.net/d3/en/forum/topic/13088129043
Greetings all!
In a couple of hours, the Diablo III servers will be coming down for
maintenance (scheduled to end at approximately 11am PDT). Once today's
maintenance concludes, you should automatically be patched to 2.0.6.
This patch should address some issues that Mac players have been experiencing
with stalling out in Nephalem Rifts. We want to gauge feedback after the patch
has gone live to see how the changes that were made now impact your play
experience. Please use this thread to report any change in game behavior in
regards to Rifts stalling out/crashing on Mac. Thank you!
翻譯： 今晚升2.0.6 預計維修到臺灣時間2am
Mac版卡秘境會修正