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I needed to make room on my Windows 7 partition to install a new program, so I did some searching on how to resize a partition and it told me to shrink the OSX side and then expand the Windows one into the free space from Windows.

That didn't work, so now I have a 245 GB boot partition (my main OSX one), then roughly 10 GB of free space, then a ~61 GB Windows partition.

I tried to just drag the corner down on the OSX partition and click apply, but all it does is unmount and re-mount Windows 7 without changing anything.

I don't really care whether I expand the Windows partition into the free space as I originally intended or just re-expand the Lion one into that dead space, but there's about 12 GB of space there that's not doing anything, and I'd like to use it.

Any ideas?

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AFAIK, you cannot resize the boot partition while booted from it. Instead, boot from a Mac OS X install DVD, then run Disk Utility there to resize your boot volume. –  fanaugen Mar 8 '12 at 7:19
    
Also note that you won't be able to resize the Windows partition "upwards". You can generally only resize partitions at their "end", not at their start. –  pmjordan Jul 2 '12 at 22:31
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