Apple released iOS 8.3 and Yosemite 10.3.3 updates yesterday, plus some other updates as well. I have them installed, no issues whatsoever. There are tons of fixes & improvements in iOS 8.3 and of course, Yosemite 10.3.3 brings us the new Photos app. You can read my underwhelming article on the Photos app here. I say go ahead and install, all seems to be well.