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From the FoCal FAQ regarding the Mac release, last entry...
When will the Mac version be released?
This is another question we've been asked a lot. We had hoped to have the Mac version released in June, but due to the release of the Nikon D800, Canon 5Dmk3 and Canon 1D-X and a few issues with their introduction the Mac version has been somewhat delayed.
We also recently took the decision to make the user interface of the Mac version better than our original intention which has slowed things a little but will produce a better product when it's released.
We are hoping to have something out in August 2012 - as this is written that's about 3 weeks time, and it doesn't take much to delay things. We have increased the size of the team working on the Mac development, and really hope to have it available very soon.