You can download AstroGuider 3.14 for Mac from our application library for free. The latest setup package occupies 32.1 MB on disk. The application lies within Education Tools, more precisely Science.
From the developer:
AstroGuider is a simple-to-use guiding application for your telescope mount. It can be calibrated semi-automatically or manually, you do not need to concern yourself about camera orientation or pixel scale.
The built-in drivers support the following hardware: ATIK CCDs Starlight Xpress CCDs ZWO ASI USB 3.
You may want to check out more Mac applications, such as AstroDSLR, which might be similar to AstroGuider.