The V-STUDIO 100's drivers are both Windows (ASIO) and Mac (Core Audio) compatible; this means that the V-STUDIO 100 hardware itself can be used with Windows or Mac audio software that is ASIO or Core Audio compliant--which is most audio recording software in the industry. However, the Cakewalk Sonar VS software bundled with the V-STUDIO 100 is Windows only. If you are using a Mac, you may use the V-STUDIO 100 hardware with Core Audio compliant audio software such as GarageBand, Logic, Audacity, etc.
If you would like to use the VS-100 with GarageBand or Logic, you may download the VS-100 Control Surface plug-in here:
VS-100 Control Surface Plug-in for GarageBand and Logic
Note: Installation and setup instructions are included with the download