(added 2/24/2015, updated 3/2/2015)
'GMYLE BT4 USB dongle used with 10.10.2 on my Mac Pro 5.1
Hello again, I promised to let you know if my BT4 dongle works. Yes it does in 98%. I can receive SMSes from my iphone in imessages, BT low power is supported according to system profiler, I can also receive calls from the iphone, but haven't tested it yet. Continuity has one flaw. When visiting a webpage on other devices I receive notification on all the others that a webpage has been visited on iphone or mac. It works on the mac pro, but after visiting a webpage on the mac pro it does not let other devices know that an event took place. It only receives continuity info, unable to send it. Continuity Activation Tool 2.0 said there was a problem with AWDL and that the interface wasn't up even though the wifi card (original Mac Pro 5.1 Broadcom card) supports it and that the tool can fix this. Now I heve check it again and it says that awdl works and the interface is up, but MP doesn't send anything. (See update below - BT was off.)
The SMSes are the only thing worth the hassle. It works great. I can read messages from my iPhone while having a call. This BT dongle came from amazon UK. It only supports Windows xp/vista/7 according to the packaging, but it works with a mac too! I can recommend it for everyone who doesn't need ac wifi and does not want to mess with MP's Wifi and BT internal cards. It is also a lot cheaper.
(and a later update added 3/2/2015)
Update on the CAT/ Bluetooth 4 USB dongle/Continuity front.
I was browsing in Safari on my Mac Pro with the USB Bluetooth 4 (BT 'on') and noticed that I have got a Safari icon on my iPhone's lock screen! It works now both ways - from and to the Mac Pro! The interface is up. The only thing I might have overlooked is that all the devices have to have BT turned on for Continuity to work :). Silly me, forgot to turn the iPhone's BT on at one point :)
Anyway this little thing gives me all the features I want from yosemity. BTW I have it plugged into usb hub on my desk along with 6 other devices so the range is good, maybe better that the internal one?
Take care, Grzegorz W.'
(added 2/3/2015)
'Combo 802.11ac Wifi + Bluetooth 4.0 card/kits for Mac Pro 5,1
I had an interesting issue with the osxwifi.com card in a stock 2010 Mac Pro 5,1
Physically went in no problem, but I had all sorts of spotty problems making Continuity and various functions (like iMessages) work correctly until I zapped the p-ram about 5 times in a row. (Before that I did clean installs and every other trick you could think of, including 1 p-ram zap). For some reason when I did the p-ram zap multiple times in a row, everything cleared up.
(An old tip was to hold the keys down until the mac startup sound repeated 3 times to help ensure it's cleared.)
Since the multiple p-ram zaps it has worked flawlessly on the Mac Pro and in combination with an iPhone 6 and iPad Air 2. My only guess is that p-ram registers do hold bluetooth related info but were not clearing out correctly. So if anyone installs the card and seems to have problems with Continuity or iMessages not working properly, I suggest trying several p-ram zaps in a row.
-Edward'
(Added 11/17/2014)
Much cheaper source of 802.1ac wifi and Bluetooth 4 LE cards: www.osxwifi.com/adapters
I have one in my old Mac Pro and it enables Handoff and Continuity without problems.
-Robert.'
(Added 11/17/2014)
802.11 a/b/g/n/ac card (+ Bluetooth 4.0) for 2008 Mac Pro
I bought a card here (osxwifi.com Apple Broadcom bcm94360cd 802.11AC + BT 4.0 with Adapter for Mac Pro 2008) a couple of weeks ago to upgrade my mac pro 3,1 early 2008. It came in less then a week for $89.99, works great, fairly easy install, cheaper than macvidcards and in stock.
-Charles'
(added Dec 5th, 2014)
Re: 802.11AC Edimax adapter(s) and OS X Yosemite
Might be useful to know that I purchased the Edimax usb adapters (small and the larger version with an antenna) which worked well with Mavericks but gave up the ghost when I upgraded to Yosemite. (Driver reinstall didn't help.)
Edimax support advised me that they knew this and were working on a new driver for Yosemite which was likely to come out in January 2015. Just fyi.
- David'