Orijinal gönderinin sahibi: originalmachead ,
Could be many things - a failed update, a failing HD or just OS corruption. Does a''' safe boot '''(shift key down until you see the spinning dial) work? If not do a '' diagnostics boot'' ''' Command-D''' boot run disk tools verify disk and repair permissions. That will tell you a lot. ''If this answer is acceptable '''please remember to return and mark it'''.''