내 문제
250 GB SSD crashed after upgrade to Yosemite. Using my limited diagnostic skills I found that the problem was related to an error with the partition map (it couldn't be read). I tried everything I could to format and partition with no luck.
나의 수리
I upgraded to a 500 GB SSD. It took 10 minutes to switch out the SSD. I used Carbon Copy to transfer the OS from an external HD to the new SSD, which took around 30 minutes. With the bigger HD space, I don't seem to be using as much of my memory (I use Memory Clean to track my memory) compared to the 250 GB SSD (when it was functional that is).
내 조언
The screws on the bottom of the MacBook Air are very shallow. Be sure to apply enough pressure downward with the screwdriver when loosening/tightening to make sure you don't strip the screws.
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