Plugable USB to RS-232 DB9 Serial Adapter (Prolific PL2303HX) Not working on El Capitan. On most recent drivers. Anyone have a fix for this?
Thank you for posting about this. El Capitan has added a new System Integrity Protection function that causes it to reject the current driver. We have a beta version of it that works, and I would be grateful if you would try it and give us your feedback.
I don’t want to post the link until it’s ready for release, but if you contact us at email@example.com, I will send you the link to it.
The new driver is now posted on the driver page for the adapter on on website here:
Please contact us at firstname.lastname@example.org if you have any issues.