Re: [chirp_users] FT8900R Upload Issue

It looks like a Mac issue.

So, I'm able to download and upload on MacOS to my FT-7800. I'm using a regular Prolific USB-serial adapter with the OSX-PL2303 driver.

I'm not sure what to say, but it seems at this point like it now must be some interaction between your cable and the driver. Have you tried the official Prolific drivers?