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I still have access to the disc, but I lost the piece of paper with the key. Can I somehow recover it? I already had a look into Keychain Access Utility, but I couldn’t find it.

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up vote 5 down vote accepted

What would be the purpose of disk encryption if the key can get recovered from the encrypted disk itself? Unless you find it in the Keychain (and I'm not even sure it's there in the first place) or somewhere else where you may have written it down, you are out of luck.

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Would it be possible to shrink the encrypted partition without erasing it, so that I can copy all data to the unencrypted half of the hard drive? – Lenar Hoyt Apr 24 '13 at 12:29
Most probably not, take an external USB drive instead – patrix Apr 24 '13 at 14:04

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