BlocklyProp Solo is an online visual programming tool for Propeller microcontroller boards.  It requires the BlocklyProp Launcher on your computer so your hardware can communicate with Solo.

• See Getting Started with BlocklyProp Solo and other tutorials at Learn.parallax.com.

NOTICE (Updated Aug 2025): Google has deprecated the technologies that BlocklyProp Launcher is built upon.  We've detailed what this means below, by platform.

Win/Mac Users: Chrome Browser support for BlocklyProp Launcher on Win/Mac ended Mar 2023; however, Parallax replaced the original Chrome Webstore BlocklyProp Launcher with a natively-installed version so you can continue to run today (see Win/Mac downloads at the bottom of this page).  Further updates may occur; return here later for new information.

Chromebook Users:  Per Google's Oct 2024 Announcement:

• Education/Enterprise Users on Managed Chromebooks: BlocklyProp Launcher can still be installed and run if it is admin-installed using Google for Education/Enterprise tools, until Feb 2028 (upon release of ChromeOS v169), or until Oct 2028 (for Chromebooks using the "LTS" (Long Term Support) channel of ChromeOS releases).
• Individual Users or Personal Chromebooks: BlocklyProp Launcher can no longer be user-installed and run (as of Aug 2025 with ChromeOS v139+).

Slow Downloads?

• If you're experiencing long delays at the start of every download to your board or bot, try turning off Bluetooth on your Win/Mac/Chromebook computer.  Recent versions of Chrome and ChromeOS changed the way Bluetooth devices are presented to software that communicate serially. On certain computers, this adds a significant delay at the start of the board or robot download process when BlocklyProp Launcher requests a list of available ports from the OS. Turning off the computer's Bluetooth hardware before programming these devices makes this interaction much faster.

Teachers and IT Admins

• Teachers & IT Admins: See the "NOTICE" and "Chromebook Users" sections above, and download the BlocklyProp Solo FAQ for Schools below before proceeding.

Chromebook Users ONLY

• See the "NOTICE" and "Chromebook Users" sections above.

Windows Users

Download and install the BlocklyProp Launcher Installer for your operating system:

• Windows 7/8/8.1/10 64-bit Installer (exe)
• Windows  7/8/8.1/10 64-bit Installer ( zip)

MacOS Users

If you have a newer version of macOS than is listed below, use the latest version (first installer) for your system.

• macOS Ventura Installer (zip)
• macOS Monterey Installer (zip)
• macOS Big Sur Installer (zip)
• macOS Catalina Installer (zip)
• macOS Mojave Installer (zip)
• macOS High Sierra Installer (zip)