Mid 2009 Model A1278 / 2.26 or 2.53 GHz Core 2 Duo processor EMC 2326

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Internal Hard Drive only recognized by target disk mode

This is a MacBook Pro (13-inch, Mid 2009). Booting it brings up the circle with a line through it.

If I put this MBP in target disk mode and boot another mac using this drive, the HD works great. Drive Genius reveals no bad sectors. The hard drive is okay.

If I take a good MBP and put it in target disk mode, and boot it's HD on this 13" MBP, it also boots okay. However, looking in disk utility and system profiler, the internal SATA drive isn't present.

My suspicion would be a bad SATA cable - but I think we can rule that out because I can access this drive over target disk mode.

Anything I might be overlooking?

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1 Answer

Chosen Solution

Sounds like the boot sectors are damaged.

Did this work at one point then die or did you take this disk from a different system and put it into this one?

If you replaced the disk then you'll need to re-partition the disk and re-format it with Mac OS-X as you may have Windows boot logic present which is interfering with the Mac boot logic.

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