CHIRP

h1. RTSystemsCablesAndMavericks

RTSystems usb cables are a branded (i.e., customized) FTDI cable. They simply have different USB Vendor (VID) and Product IDs (PID) from generic FTDI USB adapters.

Apple OSX 10.9.x aka Mavericks now has a built in FTDI Driver, com.apple.driver.AppleUSBFTDI.

However, it does not load by default because it does not recognized the custom VID/PID combos that RTSystems cables use.

Many folks have been simply loading the FTDI OEM driver (

h2. Steps

stop using and unplug all FTDI usb adapters

unload existing FTDI OEM driver (if applicable):

@

sudo kextunload -b com.FTDI.driver.FTDIUSBSerialDriver

@

Disable FTDI OEM driver (if applicable):

@

sudo mv -v /System/Library/Extensions/FTDIUSBSerialDriver.kext/ /System/Library/Extensions/FTDIUSBSerialDriver.kext_disabled

@

check to see that there are no FTDI drivers loaded:

@

kextstat |grep -i ftdi

@

(should not show anything)

Add RTSystems VID/PIDs to Apple FTDI driver:

@

sudo nano /System/Library/Extensions/IOUSBFamily.kext/Contents/PlugIns/AppleUSBFTDI.kext/Contents/Info.plist

@

add following to *IOKitPersonalities* section:

@          <key>AppleUSBFTDI-RTSystems</key>

               <dict>

                       <key>CFBundleIdentifier</key>

                       <string>com.apple.driver.AppleUSBFTDI</string>

                       <key>IOClass</key>

                       <string>AppleUSBFTDI</string>

                       <key>IOProviderClass</key>

                       <string>IOUSBInterface</string>

                       <key>InputBuffers</key>

                       <integer>8</integer>

                       <key>OutputBuffers</key>

                       <integer>16</integer>

                       <key>bConfigurationValue</key>

                       <integer>1</integer>

                       <key>bInterfaceNumber</key>

                       <integer>0</integer>

                       <key>idProduct</key>

                       <integer>0x9000</integer>

                       <key>idProductMask</key>

                       <integer>0x9000</integer>

                       <key>idVendor</key>

                       <integer>0x2100</integer>

               </dict>

@

plug in your rtsystems ftdi usb adapter

Force load of Apple FTDI driver:

@

sudo kextload -b com.apple.driver.AppleUSBFTDI

@

verify Apple FTDI driver is loaded:

@

hackpro:~ jens$ kextstat |grep -i ftdi

  129    0 0xffffff7f826d0000 0x7000     0x7000     com.apple.driver.AppleUSBFTDI (1.0.1b3) <77 36 5 4 3>

hackpro:~ jens$ 

@

Verify Apple FTDI device node is created:

@

ls -l /dev/cu.usbserial-*

@

*good result*: should list a device file

*bad result*: "no such file or directory"

h3. Note

*You may need to repeat these steps if Apple updates FTDI driver (such as in a Combo Update aka Minor update release)*