bluetooth unavailable since 10.10.3 update

I did have the same problem, the bluetooth was not available and could not be seen in system pref / top bar. This occurred after I changed the batteries for my keyboard.

This solved the problem for me (10.10.5):

- shut down (not restart)

- all usb devices out from ports (http://www.techrepublic.com/article/pro-tip-how-to-troubleshoot-bluetooth-issues -in-os-x-yosemite/)

- start and reset the PRAM holding Cmd+Option+P+R. Although I did not get the two beeps though so cannot be sure if resetted.

- on startup imac started to seek for Bluetooth devices and found the keyboard

Interesting thing was, as this problem occurred, also an image of eject appeared on my top bar

Post 10.10.3 update - My bluetooth devices don't connect either.

• Apple trackpad
• Apple mouse
• Apple keyboard
• BlueBuds X earphones

All these devices will connect to other macbook pro (older 2010) and iPhone 5.

15' Macbook Pro Retina Early 2013 , OS X Yosemite (10.10.3)

The first step in this document resolved it for me (http://www.techrepublic.com/article/pro-tip-how-to-troubleshoot-bluetooth-issues -in-os-x-yosemite/)

Reset PRAM at reboot time. Press and hold ALT + CMD + R + P until you hear two chimes at reboot.

Hope this helps

FYI....resetting the PRAM usually does nothing in this situation.

Resetting the SMC frequently corrects the problem.

Barry

Did you reset the SMC like this?

Intel-based Macs: Resetting the System Management Controller (SMC) - Apple Support

Barry

I was having the same problems with my 2015 iMac - resetting the SMC didn't work and resetting the NVRAM/PRAM didn't work. Taking these steps and rebooting did force the system to correct itself, and now the Bluetooth is working correctly:

• Delete com.apple.Bluetooth.plist from /Library/Preferences
• Delete files named com.apple.Bluetooth.somehexuuidstuff.plist from ~/Library/Preferences/ByHost (note that this is the user preference folder, not the system one)
• Reboot!

Sometime after I updated my late-2014 27" iMac with Retina Display to 10.10.3, I noticed both my Apple Wireless Keyboard and Apple Magic Trackpad were very "sluggish". I then noticed the squiggly line through the Bluetooth icon. I searched and found this thread and performed an SMC reset without success. I then tried the NVRAM reset by holding down Command, Option, P, and R at bootup until I got a second startup chime. That fixed it.

As a side note, I switch from PCs to Macs in 2008 and have owned several iMacs and MacBooks since then. 7 years ago, everything was rock solid, but the last few years I seem to be having more and more little problems like this - mostly software related. It's like Apple is losing touch with their former self and is trying to rush out products too soon and/or trying to add too many features without enough testing. While still far better than the competition, Apple seems to be falling victim to popularity the last few years - at least from my perspective.

I know your issue required more in depth troubleshooting, but after the same exact symptoms, a simple reboot fixed the issue for me. Just adding this to the thread to establish the fact that not every case will be the worst case.

I've also experienced this issue where none of my bluetooth devices will connect to my Macbook Pro after the 10.10.3 updated. I read on another post (can't find the url) that if you shutdown, disconnect all USB devices, wait 2 minutes and reboot then bluetooth will connect again. I followed the steps and like magic bluetooth was working again. However, the same problem happened again this morning, so I had to go through the steps again.

I'll try some of the more exhaustive steps from this thread the next time this happens.