Ascom Driver Download For Windows
Development snapshots

We recommend running the latest development snapshot build to get the latest bug fixes and enhancements. The development builds are updated more frequently than the general releases below.
TheSky™ ASCOM Telescope (TeleAPI) Plug-In for TheSky 5/6 (5.0.4) Do not use this with TheSky X.Plug-in that allows Software Bisque's TheSky 6/5 Astronomy Software to control telescopes via ASCOM telescope drivers. For more information see Working with TheSky (section 3). Download then run this to install the plugin. Download Center. This page lists items that the ASCOM Initiative has made available for download. The ASCOM Platform is required for most of the drivers and other components. It contains a set of common interfaces, engines, and tools that are used to support most ASCOM drivers and other components. ASCOM Driver Update Log.The System pack might include the part you do not need, which will be automaticlly skipped during the installation.EZCAPQT is developed by QHYCCD, it could be used in QHY devices tests, simple capture tasks, and above all, the management of updates.
ASCOM is a many-to-many and language-independent architecture, supported by most astronomy devices which connect to Windows and now Linux and MacOS computers. The diagram below shows how ASCOM differs from traditional astronomy instrument control architectures. This architecture applies to both Windows/COM and cross-platform Alpaca technologies. .Includes the following version of of the Windows operating system: Windows 7, Windows Server 2008 R2 and Windows 8, 8.1, Windows server 2012 R2, Windows Server 2016 and Windows 10. Also, as Windows 8 RT is a closed system not allowing for 3rd party driver installation our Windows 8 driver will not support this variant of the OS.
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.
macOS downloads
For macOS 10.14 Mojave and newer, install the 64-bit version of PHD2. For older versions of macOS, install the 32-bit version.
Linux packages

Ascom Driver Windows 10
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.
