PolyVision was discontinued. Drivers are now hosted by Steelcase (former parent company) or third-party archives.
Apple has dropped 32-bit application support entirely. The last PolyVision driver compatible with macOS was version 3.1.0 (32-bit), which on macOS Catalina (10.15) or newer.
If your computer no longer recognizes your board, the calibration is off, or the interactive pen isn't working, you likely need to update or reinstall the driver.
. He hit download. The progress bar crawled like a tired snail.