So, naturally, it's no surprise that 10.10.3 is a required update for those wishing to update to Server 4.1. Server 4.1 didn't require as large an update as Yosemite, mainly due to the fact that OS X Yosemite serves as the underlying foundation for Server 4.1, with numerous security patches to further harden the security of your Mac server. This was a much smaller update in terms of size and payload, but it was very important for system admins responsible for managing local and mobile devices, particularly those with iOS 8.3 installed. This brings us to Apple's other recent update: OS X Server 4.1. Update 10.10.3 has been in the wild for just over a week, and the number of reported issues have dwindled, which is not surprising considering the full breadth of improvements contained in the massive update. Since its initial release, end users have been plagued with numerous issues, with arguably the most vocal problem affecting Wi-Fi connectivity. On April 8th, Apple released its much-anticipated update for OS X Yosemite, 10.10.3.