Hi everyone,
I wanted to do a post detailing my Bluetooth 4.0 and AirPort/Wifi upgrade.
2011 iMac 21.5 inch - EMC 2428 - A1311 model
I installed the
Broadcom bcm94360cd after deciding the next upgrade over this card was probably more than I need for an old machine and the price was relatively quite a bit more from what I remember. Card and adapter was purchased from AliEx from Fenvi store
https://www.aliexpress.com/item/32704591968.html?spm=a2g0s.9042311.0.0.27424c4desb3xL (as of early 2021)
The new wifi card needs 1 additional antenna style cable to connect the old Bluetooth wire to the new card. I order 3 just in case (
only used the 1) from this store in the image below. 50 cm / 19.7 inches could have possibly worked with the 40 cm / 15.8-inch version as there was a little extra slack, but I would go with the 50 cm to be sure.
https://www.aliexpress.com/item/32580132447.html?spm=a2g0s.9042311.0.0.27424c4desb3xL (as of early 2021)
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Torx T-10 screwdriver for the monitor panel removal.
Torx T-6 screwdriver needed for the wifi card screw.
Soldering iron - used a cheap 10 Euro 60-watt from amazon.de (was not of very good quality but worked)
Solder wire used 1mm with flux already in it.
A cord with at least 3 wires to hook up the 3.3V and the usb_D+ and usb_D- I cut up an old generic iPhone 2.4 amp charging cable. cut to approximately 50 cm or 20 inches.
Some wire cutters/ strippers maybe a razor utility knife to help open the factory-installed Bluetooth cable, mine was sticky and kind of a pain to open the end after cutting off the wire harness plug-in.
Heat shrink tubing if you're particular about covering up the wiring.
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IFixit guide on how to open your computer make repairs, if your not already familiar.
Model A1311 / Mid 2011 / 2.5 & 2.7 GHz Core i5 or 2.8 GHz Core i7 Processor
www.ifixit.com
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2.4 amp generic iPhone cord cut to approximately 50 cm / 20 inches + BT extension antenna
Factory insalled Bluetooth cable / Cut off the plug-in adapter-harness. D+ purple D- red 3.3 volt grey
*Other two wires blue and black are ground wires, which can just be cut back and not used.
My soldering skills have not been tested in many years, so its not great. Does the job though and works. 3.3 Volt wire (Red) touches both factory solder spots on the R1 lower connection.
* Your wire colors might be different, just write down which color to which color and double check before soldering.
I applied some heat shrink tubing to help cover up some of the exposed wiring to keep it neat and tidy.
New Broadcom bcm94360cd Wifi antenna order: no line=J0 / one line=J1 / two lines=J2 / BT extension=J3
4th antenna spot (J2) causes the wifi card to sit at an angle and touch the mounting screw. No worries, it works fine and LCD screen re-installs fine.
50 cm or 19.7 inch Bluetooth extension antenna, some slack in the line had to fold behind another wire. Simply plugged together, male & female. I left old blutooth board inside the machine with no issues, don't see any reason to take it out.
General over-view of how everything looks. No DVD drive.
Final Specs
The computer turned on and I had to plug in a wired keyboard, navigate over to password and login. Computer within 1-2 minutes set itself up to regonized the original Apple keyboard and magic mouse it came with.
Machine is currently running High Sierra, had Catalina on it a few weeks ago, but was somehow not right so went back to High Sierra, maybe I try again later.
Wifi works perfect, maybe better, and the Bluetooth and Wifi can both be powered on/off independantly. I don't own an Apple Watch, have not tested airdrop and other features yet, as I don't use them often. Update: Airdrop works
Thank you! very much to all that came before me and helped contribute to the thread, I hope my post can help someone else out down the road. The whole process took me 2-3 hours. Could be done in 1/2 the time if you are quick and solder on a regular basis
Once again this is for a
2011 iMac 21.5 inch process looks similar for other models but not exactly the same.