Steps taken from "BayArea Shopper[amazon]" posted 8/27/16 which worked for a solution on Mac:
1. DO NOT plug in your USB Bluetooth dongle before starting. (If you already did, unplug it now)
2. Open your Mac System Preferences, select "Bluetooth" under System Preferences.
3. At bottom of the window is a checkbox: [ ] Show Bluetooth in menu bar..... Click box so it shows a checkmark.
4. You should now see the Bluetooth icon in the Mac Menu Bar.
5. Hold the OPTION KEY down and click Bluetooth Icon in Menu Bar. This will drop down a menu which shows some additional info than just a regular click on the Bluetooth icon. Look at line 3, which starts with the word "ADDRESS:" You'll see a sequence of numbers and letters something like the following: 00-22-41-CE-46-24 (The letters and numbers you see may be different- that is OK!) Also, this line is greyed-out on the screen. That's normal. This is the specific address of the Bluetooth transmitter currently in use internal to the Mac device. If you did not yet plug in your USB luetooth dongle, the address you see should be your Mac's built-in Bluetooth adapter.
6. Now cross-check this information because it is the way to know when your new Bluetooth dongle is activated and in use: Click on the APPLE icon in the menu bar, select "About this Mac". In the pop-up window that shows, at the bottom of that screen is a button "System Report". Click it.
7. You should now see your full system report. Column 1 begins with header "Hardware": The 3rd line down is "Bluetooth"- click to select it. Now on the right side of the screen is the full set of specs for the currently-in-use Bluetooth transmitter. Look at line 2 which also begins with the word "Address". You should see the exact-same sequence of numbers and letters as in Step 5 above. Take a screen shot of this info- it is helpful so you can tell between this address and the Bluetooth transmitter address of your new USB-dongle. (Screenshot: Press Command-Shift-4 - Now marquee-select the area of the screen you want to capture; as soon as you release the wired mouse or trackpad the screenshot is taken)
8. Now go back to the Bluetooth icon in menu bar and click. Select "Open Bluetooth Preferences"
9. In the Bluetooth system preference screen, in the left column is the Bluetooth ON / OFF switch: Click to turn Bluetooth off. (If it is already off, then click it ON, then click it OFF right after.)
10. Wait 3-4 seconds and then insert the USB Bluetooth dongle into a USB port on your Mac.
11. Activate your Bluetooth device such as a mouse, and switch it into "Pairing" mode.
12. Your should see the name of that device appear a few seconds later in the right-hand column of the Bluetooth System Preferences screen. To the right of it you should see a button appear that says "Pair". Click on Pair. Moments later your device should now connect. When it does connect it will say "Connected" underneath the device name.
13. The USB Bluetooth device should now be working. Verify now that the dongle's Bluetooth transmitter is the one that is connecting your device, and not the Mac's built-in Bluetooth. OPTION-click on the Bluetooth icon in the Menu Bar; a menu drops down; on line 3 you will see "Address" followed by the number-letter sequence of the currently operating Bluetooth transmitter. Your Bluetooth dongle *may* have a MAC (media access control, not to be confused with a Mac device) address like 00-1A-7D-DA-71-06, or similar format.
14. You can also cross-check this number/letter format by repeating steps 6 and 7 above. One of the ways you will know FOR SURE if this is the Bluetooth adapter in operation is checking the line "Manufacturer:" ... It should say the name of the manufacturer different than the native one internal to the Mac device. If it does not, try to repeat the entire sequence. You should also see the name of your connected Bluetooth device under the sub-head "Devices (Paired, Configured, etc)."
