macOSHhigh Sierra 10.13.5 update won't complete download Always finishes at 100% but then the button turns to UPDATE again. Then when I click update again it restarts the update starting at about the 1.7GB mark and completes 100% then around in circles we go. I've restarted and logged out/in etc. Currently 10.13.4 (17E202). I'm in China but that shouldn't matter. I've even tried updating with VPN. All other Xcode updates etc work fine. EDIT: So now one time the button actually said INSTALLED which is weird because even if I did downloaded it I never restarted so there is no way it could be installed. But alas after I did restart to test, the button turned to update again. It still isn't installed. The update is starting again from about 1.7GB.