But, by not even installing them on the Mac side, and using the Keyspan software within Windows, it works as a “Windows Only” unit, and without having OSX drivers in there at all, there is no interference. Post as a guest Name. I have a USB-serial adaptor that I really depend on. Am I just stuck and need to get something “newer”? Go to original post. Website Design by Alvitr. But I don’t know anything about root users and such.

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He is adding a section to Info. So the final product for my Tripplite version of the Prolific adapter works when I have this section added: Sign up or log in Sign up using 0x23033. Please note that if the MAC OS X is rebooted then the kextunload command needs to be run again since it will be loaded upon boot.

Also please include the Mac hardware in use and if you can what you are attempting to connect to your Serial interface. It 02303 look something like this:. Post Your Answer Discard By clicking “Post Your Answer”, you acknowledge that you have read our updated terms of serviceprivacy policy and cookie policyand that your 0x23003 use of the website is subject to these policies. Thank you, Jim Wagner.


This is because the vendor provided drivers always seem to be out of date. There are a couple different USB to serial adapters that you might use as a network engineer. As for a free application, try CoolTerm.

I have a USB-serial adaptor that I really depend on. So if your vendor ID was 0x for Tripplite with a product ID of 0x, you can change the key for your new section to: Sign up or log in Sign up using Google. You should now have a working USB device! Scroll down and you will find a section that looks like this: By using our site, you 0x230 that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service.

Therefore it is up to the vendors to provide drivers.

Plugable USB to RS DB9 Serial Adapter (Prolific PLHX Chipset) – Plugable

I cannot downgrade the OS. In case you suspect a counterfeit chip inside, so may also contact Prolific to provide the vendor information. I cannot downgrade the OS, Do you have the same issue? Mac OS High Sierra The usb ports on the Mac mini suck and will not work with usb to serial devices.

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Or, is there a way to fix it? We need to convert the hex numbers to decimal.


I have tried about 10 different drivers from a google search with no luck. Apparently, it is not allowed to make changes to the Info.

USB to Serial on macOS Sierra not working – Ask Different

The seller HAS a newer XP driver but there is no installer and no information about what is to be done with it. No model, no serial, no nothing, but apparently uses a Prolific chipset.

Please be warned that selling counterfeit products are illegal and punishable by civil and x02303 courts according to the trademark, copyright, and intellectual properties laws and regulations. This tool uses JavaScript and much of it will not work correctly without it enabled. Taipei Headquarter 7F, No. Prolific recommends following vendor cable brands: I too seem to have the same problem with the driver sending, but not receiving.

Prolific will take proper and severe actions to cease and confiscate these counterfeit products. Super User works best with JavaScript enabled.