As usual, with each update to Mac OS I seem to have trouble locating a working PL2303 Serial to USB drivers for my older technologies… programming radios, Tripp Lite Keyspan High Speed USB to Serial Adapter USA-19HS, serial/USB GPS units, etc.
Some quick notes that I hope will help me (and you?!) in the future:
- Visit https://www.prolific.com.tw/US/
- Click Support
- Log in with guest and guest as username and password
- At the bottom look for the link: Click here for PL2303 USB to Serial Drivers.
- Down on that page look for a section similar to: Mac OS X Universal Binary Driver v2.2.2 (PKG file format) [Or whatever version might have been released since this post]
While I would recommend going through the process above just in case newer versions have been released, I am going to include a direct link to the file for quick access:
Note: They also show it as available in the Mac App Store here: