OS X 10.9 Mavericks does not work on versions of Authentication Services lower than 22.214.171.12453.
MAC OSX 10.9 Maverick is supported on version 126.96.36.19940 and up.
STEPS TO INSTALL on Mac 10.9:
1 - Download Authentication Services 188.8.131.5240 or higher which can be downloaded from:
2 - Extract the download with a compresion utility
3 - Navigate to client/macos-108 folder
4 - Run the VAS-4.1.0.*.dmg or the install.sh from the terminall app as root