I successfully installed Sierra on my mid-2009 MacBook using the patch tool. Seems to work pretty well so far (not as fast as my i7 MacBook!). Luckily haven't had any wifi issues or any of the other problems that I've read on other threads. However I did notice that my iSight is not working. Whenever I open the Facetime app or Photo Booth I get an error saying that there's no camera available. I also looked up the system report and under "Camera" it says "No video capture devices were found.". Any ideas?