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 1.0.56.0 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.

v2.6.6

24 March 2019

Lots of improvements to the Guiding Assistant
Updated camera support: Altair, QHY, SBIG, SSAG (Mac), ZWO ASI
New ToupTek camera support for Windows
New MallinCam SkyRaider camera support for Mac
INDI SBIG AO support
Better detection of problems like runaway guiding, excessive backlash, and calibration problems
Improved backlash compensation
New Meridian flip calibration tool
New ZFilter guide algorithm
Guide algorithm None has been removed
INDI improvements
Various minor user interface fixes
Updated Help file
Updated translations

Download v2.6.6
for Mac OS X Download v2.6.6
for Windows

Older Builds

v2.6.5

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

v2.6.4

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

v2.6.3

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