Flashing folder with question mark, spinning beachball when wakes up My MacBook is acting weird recently. It starts to show flashing folder with question mark during bootup and spinning beach ball when it wakes up from a long sleep. When these happens, I will have to power it down, then it works perfectly again. They occurs quite frequent, about once in every 5 bootup/wakes up.

Running Lion 10.7.4, and I just replaced the HDD with a SSD 2-3 months ago. The problem starts to occur about a month ago.

I suspect it has something to do with the SSD, but I can't really pinpoint the exact problem. I'd already reselect the startup disc multiple times in system preferences.

Any ideas? Thanks.

Update: OWC just came back to me, telling me it's probably due to SATA incompatibility and is offering me a refund. The refund is 50 dollars less than the purchase price (current value price, he said) and I am responsible for the shipping cost. I am considering if I should just keep it, as I am not located in the states and shipping back is really an hassle, plus the cost.
The Folder with a question mark on boot indicates that it could not find a bootable partition. There is something flaking with your drive, get it diagnosed, repaired, or replaced, ASAP.