MacOS Sierra on Unsupported MacBook Air 2,1 (late 2008)
I appreciate everyone's hard work, but so far I have not been able to successfully boot into Sierra even once using the tools and methods posted here.
Edit: Finally got the installer created with
@dosdude1's tool to boot by adding MacBookAir2,1 to PlatformSupport.plist, but with no USB support it's impossible to use.
Edit2: I now have a full install booted off the MacBook Air's internal SSD, but still no USB.
Edit3: Is anyone else seeing this? It appears that, at least for me, LegacyUSBInjector.kext is a dud.
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Edit4: It runs, but without USB and without Wi-Fi it can only be considered a proof of concept at this time. I was luckily able to pair a Bluetooth keyboard & mouse to grab this screenshot.
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Edit5: I forgot that Bluetooth is on the USB bus, so it's at least partially working. It doesn't recognize the internal keyboard/trackpad or anything connected to the single USB port, though.
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Edit6: Got an internet connection established with Bluetooth PAN. Siri does work. I also updated the About This Mac shot above with the (Late 2008) present.
I will admit that system performance is very poor in some areas but this is low-spec hardware and Sierra is only a beta 1. Not a good combination.
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