upgrade bluetooth 2.1 on imac mid 2011

[mikel_keul]

upgrade bluetooth 2.1 on imac mid 2011 - how to do ?

 

[Lifeisabeach]

upgrade bluetooth 2.1 on imac mid 2011 - how to do ?

The mid-2011 iMacs already come with Bluetooth 2.1+EDR. What exactly are you trying to accomplish?

 

[pigoo3]

upgrade bluetooth 2.1 on imac mid 2011 - how to do ?

Upgrade to what?

- Nick

 

[mikel_keul]

I want to upgrade my bluetooth 2.1 on my imac mid 2011 by bluetooth 4.0.

 

[bobtomay]

Buy a plug in adapter - something like this.

Need to read reviews yourself to find one that will work with OS X.

 

[Lifeisabeach]

I want to upgrade my bluetooth 2.1 on my imac mid 2011 by bluetooth 4.0.

Why? If it's to enable features like Handoff in Yosemite, that won't work over a USB dongle. I did some reading and a number of people are reporting in other forums that they have been successful in getting Handoff to work on 2011 MacBooks by replacing the Bluetooth card internally and modifying a system kext file. Here's one post explaining what was done:
[How To] Enable Handoff/Continuity in Yosemite on unsupported Macs. : osx

Here's a more comprehensive discussion on the matter.
Handoff Breakdown With Activation Tool - MacRumors Forums

 

[harryb2448]

If your are running Yosemite Bluetooth version is 4.3.1f2 on that model iMac. What operating system are you actually using? May be time to upgrade.