These are MacOS Builds of Widelands. They are done and uploaded manually,
therefore they are not really daily, but nearly so. All of these are 64bit binaries for x86_64.

The ones in the MACOS_10_9_OR_HIGHER directory support Mac OS versions back to and including 10.9.

You should choose the highest Mac OS version that you can, i.e. if you run
10.11, you should use the binaries in MACOS_10_9_OR_HIGHER.