PL-2303 MAC X driver FAQ
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Q1: How do I install the PL-2303 MAC X driver?
 
A: First, download the PL-2303 MAC X driver from our support website.
Then, uncompress the .zip file and executing the .pkg file. This will
install the driver automatically. 

Note: You need to restart the computer after installing the Mac X driver.
The PL-2303 Mac X driver only supports V10.1.X so you need to upgrade 
first your OS X by SOFTWARE UPGRADE.

Q2: How do I test the PL-2303 MAC X driver?
 
A: You can test all COM port devices for MAC X except serial keyboard 
and mouse since these devices are not supported. 

For example serial modem: 
1. Set modem using PL-2303 COM port.
2. Set your modem model.
3. Execute REMOTE ACCESS to connect to the internet.


 
Q3: How do I uninstall the PL-2303 MAC X driver?
 
A: 
1. Open "Applications-> Utilities-> Terminal" 
(Need to create ID & password first on NetInfo Manager)
2. Login to root user¡Ato type "su"¡Ainput password
3. To type "cd /System/Library/Extensions" to enter "Extensions" folder.
4. Unload driver ( if had been loaded )¡Ato type "kextunload PL2303.kext"
or "kextunload ProlificUsbSerial.kext".
5. Remove driver¡Ato type "rm -r PL2303.kext" or 
"rm -r ProlificUsbSerial.kext".

Q4: After I completed installation of the PL-2303 MAC X driver under OS
10.2, a warning will appear saying that "ProlificUSBSerial.kext" has 
problems and there are three buttons that can be selected. 
What does this problem mean?
 
A: This problem occurs because the PL-2303 MAC X driver was compiled
under OS 10.1.X. So when you install the driver under OS 10.2, it will
show this warning message. User just need to select the "Fix and Use" 
button to make it work under OS 10.2.X.