Hi ! I have an old MacBook early 2008 4.1 polycarbonate white and send it for my young boy. But the mistake is with lion the os are to old and can't use it corectly safari chrome etc.. it's very sad because os x lion run very fast when I see old Pc on Windows 7 slowly but all software works. I have test to update it on Yosemite and can create usb with MacPostFactor and work fine. But can't install the X3100.pkg kext with MacExtractor. for apply kext I download files for Gpu update recovery and audio and Gpl but the os are slowly and when apply audio kext the dock disapear and black wallpaper Rrrrr I do to reisntall many times. I think is better to install linux ubuntu or Elementary os juno or Chrome book os or Windows 7 ? If someone Can help me for install the best Os run more good in this old macbook with 4go of Ram. Thanks.