Fixing Bluetooth Discovery Problems in OS X Yosemite
Some Mac users running OS X Yosemite have discovered Bluetooth to become unreliable, either dropping device connections constantly or even simply not discovering a working Bluetooth device. For example, some users who are trying to use a PS3 controller with the Mac in OS X Yosemite may find that the Mac is unable to locate the Bluetooth controller at all, despite being right next to the computer and properly following the configuration instructions.

In some specific situations, Mac users running OS X Yosemite may wish to re-download the complete installer application of a prior operating system like OS X Mavericks. This is typically something only advanced users would want to do, perhaps for making a bootable installer for the older OS X version, for upgrading a different Mac, or even to downgrade (more on that in a moment), but unless you have a compelling reason to download the prior OS X release installer there is little other reason to do this. 




Apple has issued a critical security update to OS X users aimed at patching an exploit with the network time protocol on most Macs. The update is labeled urgently as “Install this update as soon as possible” rather than a traditional name, perhaps indicating the importance of patching the unspecified issue with the Macs NTP.






