Download Open Labs Driver

  1. Download Open Labs Fader Control Panel (loader) for Windows to uSB driver.
  2. USB Driver Downloads and Updates for Windows 10, Windows 8, Windows 7, XP & Vista - Update USB Drivers for your PC - Trusted Driver Support from
  3. If you agree with the details listed above, click one of the following links corresponding to each OS to download the virtual COM port driver installation program. For Windows ® 7/8.1: ''(v6.7.6) 6.83MB download For Windows ® 10: ''(v10.1.8) 878KB download.
  4. Find Open Labs software downloads at CNET, the most comprehensive source for safe, trusted, and spyware-free downloads on the Web.

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Viscosity for macOS

Version 1.9.2 Release Notes
Requires macOS 10.13 or later.

Viscosity for Windows

Download Open Labs Drivers

Version 1.9.1 Release Notes
Requires Windows 7 or later.

Installing Viscosity (Mac)

1. Quit any old copies of Viscosity that are running. 2. Open the Viscosity.dmg file in your Downloads folder. 3. Drag the Viscosity icon to your Applications folder. 4. Eject the Viscosity disk image from the Finder. 5. Launch Viscosity from your Applications folder.
Detailed Instructions


Installing Viscosity (Windows)

1. Exit any old copies of Viscosity that are running. 2. Open the Viscosity Installer.exe file in your Downloads folder. 3. Click Yes to the User Access Control prompt. 4. Follow the instructions displayed in the Setup Wizard. 5. Launch Viscosity from your Start menu.
Detailed Instructions

30-Day Trial

This download is a fully functional version of Viscosity, which will stop working after 30 days. To continue using Viscosity after this period you will need to purchase a license.
After buying Viscosity you will receive a license code that will activate your copy, so you don't need to download Viscosity again.

Development snapshots

Actiontec drivers for windows 10. 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.

Open Labs Austin Tx

Upgrading from an earlier version of PHD2

Download Open Labs Driver Windows 7

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.

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

Download Open Labs 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.