So these crazy expensive 'upgrade kits' may be for some people a good alternative. But as already mentioned, at least soldering of one cable is required. Regarding the cost, it is possible to get also at the Unibody iMac line an 802.11ac & BT4.x upgrade for approx $30. This will be a HARD task, - especially at an Unibody iMac (with aluminum backside). Well, on the BCM94360CD it is (strongly) recommended to install a fourth antenna. The BCM94360CD has four normal U.FL connectors, so no antenna adapters are needed.
However, on these card three U.FL female to MHF4 male plug antenna adapter cables (see my post) are needed. In contrast, the BCM943602CS and BCM94360CSAX runs in 3x3 MIMO mode, - they will reach on the 5 GHz band up to 1.3 Gbps. ) The BCM94360CS2 is only a 2x2 MIMO combo card (with only two antenna connectors) and is therefore NOT really suitable for upgrading an iMac! (It reaches max.
It seems that I have mixed up something totally.
