Hi All, I installed the beta this weekend and it was working great. My mid 2010 MBP ran out of battery and after charging, it would not turn back on. the while light on the front came on, and the HD made a noise like it was turning on but then the screen remained black and nothing happened. After bringing it to Apple, the rep restores me to 10.9.4 Mavericks and this process wiped all my files off my computer. Is there anyway to get my files back (music, photos, word, excel?) I did not have them backed up.