Phonegap-mac did not see any work at that time. Perhaps try MacGap ( https://github.com/maccman/macgap ), which is a fork and is still actively developing.
UPDATE 2014-03-18 . Recently, MacGap has also not seen much work.
In my last application for the Mac App Store HTML5, I used Cordova http://cordova.apache.org , since I think this is the best solution in the long run.
There is a version of cordova-osx that can generate an OSX project. It's not as close as the iOS / Android cordova platforms, but it works - and it's probably a better solution than MacGap if you are hoping to support iOS + OSX as well. (saying that MacGap probably works better out of the box now).
Please note that CLI Cordova does not currently work with cordova-osx - you need to manually support the OSX X-Code project, which is a pity. In addition, many Cordova plugins do not support OSX.
I needed to do a little “hack” for my application to work on Cordova OSX. But at least I now have an HTML5 application that can run on Android / iOS / OSX, which is pretty cool.
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