Icon Tool for Developers 1.5 | MacOSX | 2 MB
Easy icons for iOS, OSX and Android. You can build from a single large file - or provide multiple files and let Icons Tool fill in the gaps.
iOS - save as XCAsset or plist
OSX - save as XCAsset or .icns file
Android - Just save!
Icns Builder relies on iconutil which should be installed at /usr/bin/iconutil to generate an icns file.
If it isn't present, then installing XCode and clicking on 'Install command line tools' should install it for you.
Compatibility: OS X 10.7 or later, 64-bit processor
Home Page - http://hobbyistsoftware.com/icontool