Download PHD2

macOS Catalina

Download the latest 64-bit PHD2 for Catalina here: development snapshots.

Development snapshots

Development snapshot builds are available containing the latest bug fixes and enhancements. These builds are updated more frequently then the general releases below.

Upgrading from an earlier version of PHD2

Just download and run the installer. There is no need to uninstall the older version first. If you do uninstall the older version, you will remove all your profiles and settings.

Note for Gemini/Gemini2 ASCOM users: PHD2 requires Gemini ASCOM Driver Version or newer.

Stark Labs PHD users: PHD2 installs separately from PHD so you can have both applications installed at once. Installing PHD2 will not affect your PHD1 installation or settings.

Linux packages

Patrick Chevalley has PHD2 Ubuntu packages hosted on Launchpad. If you are using another Linux distro, you can build PHD2 from source: Building PHD2 on Linux.



24 March 2019 Download v2.6.6
for Mac OS X
Download v2.6.6
for Windows

Older Builds

    [Windows Download EXE]     [macOS Download ZIP]     [macOS 32-bit Download ZIP]
    [Windows Download EXE]     [macOS Download ZIP]     [macOS 32-bit Download ZIP]
    [Windows Download EXE]     [macOS Download ZIP]     [macOS 32-bit Download ZIP]

News & Resources

December 21, 2019 - PHD2 Best Practices

December 7, 2019 - macOS Catalina

March 24, 2019 - PHD2 v2.6.6 Released

April 26, 2018 - Polar Alignment tool video tutorials

June 12, 2016 - PHD2_Broker package available