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Your MacBook has a Broadcom BCM92070 bluetooth card which is actually an USB dongle. (it's sometimes soldered on some "hybrid" Wi-Fi+Bluetooth mini PCI-e cards but they work separately; see the linked question at the end if you're curious) That "dongle" requires a firmware to be loaded before it can be used, and it appears that some communication with it ...


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You can swap the keys with Karabiner, while DoubleCommand can only turn your fn key into a control key, but not the reverse. My strategy (which you might find to be an appealing approach for you too) was to first remap only the fn key, so that either would work as control, and then when I'm used to always using the far left key as control actually popping ...


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Retina display Macbook Pros come with switchable graphics (one Intel Graphics HD and one dedicated graphics card), right? It might be the built-in "Display Power Saving Technology" feature for Intel Graphics that's causing the "brightness" shifts. Does it happen only when your laptop's running on battery? To check, right-click anywhere on the desktop, go ...


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Needs to be HDMI 1.4 to support 2k or 4k resolutions. Based on my own experience & similar questions in this forum, use a Thunderbolt/mini-DisplayPort to DisplayPort or possibly DVI [I have had much better luck with DP]


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There is actually a termperature sensor located on the back of the touchpad. According to this link (https://www.ifixit.com/Answers/View/71048/Where+is+the+left+palm+rest+temp+sensor , check the accepted answer there), the "left palm rest sensor" is located on the back of the trackpad in 2010 MBPs and would cause the described problems if faulty or ...



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