(B) - From the FTDI Application Note AN_134:ĥ.4 The device cannot be accessed even though the deviceID is supported in FTDIUSBSerialDriverĪn ownership or permissions problem is preventing the system from making the device accessible.Ĭheck that the driver is owned by root and wheel. (but not any D2XXHelper file as one would expect from the EtreCheck report, anyway, the D2XXHelper.kext would block the desired VCP driver so it must not be installed / loaded) Library/Extensions/FTDIUSBSerialDriver.kext I’ve run EtreCheck 3.0.3 (307) (it crashed twice when I was typing the “Problem description”?) and found probably related info: PS: This sounds similar with Yosemite (although my device definitely has an original FT232RQ chip): also when the Parallels VM isn’t running the USBSerial doesn’t show up in /dev when I plug it in. I also can hand it back to OS X but it's not recognized there.ītw. However, when I select the device from the VM “Devices” menu the VM tells me “FT232 UART is now connected to the Win XP” and I can send commands and receive statements from the test equipment.
In the VM under “Devices” I can see the FT232 UART but connected to the Mac, and it’s not accessible in Win XP. Now I select “Mac” but nothing happens in OS X.
When I plug it into the iMac the VM automatically jumps in: “FT232 USB UART, new device detected, connect it to Mac or Win XP?”. It works with my Win - laptop and my (office) iMac (with an USB extender), but only when using the “Parallels” Win XP.
I’ve adapted the electronics of that device (stripped the internal RS232 to TTL converter electronics for the uP, added the the USB socket and USB-TTL conversion with FT232R) to connect to modern computers. I’d send a (serial) “request” and the device will answer accordingly, e.g. The device is a test equipment with a serial port, originally RS232 (+/- 9V, DB-25).
Nope, not visible in Finder or Disk Utility, it’s not a drive, it won’t reply without a command. I’ve tried again and again, there is no FTDI or USBSerial device listed in /dev when I plug it in or switch it back from Win - I guess because the (OS X) driver isn’t correctly installed? The installer always tells me “success” but I still can’t see the driver /System/Library/Extensions/FTDIUSBSerialDriver.kext (should it be there?) and the device isn’t accessible from OS X. I have also disabled (renamed) the AppleUSBFTDI.kext, restarted and installed the FTDI driver (version 2.3, signed by Apple). In OS X it seems to be unknown, however, the USB Device Tree reports the FT232R USB UART correctly with Product ID and Vendor ID from FTDI.īut I want to get rid of the Win (VM) solution and installed the FTDI driver for Mac, didn’t work. Using an old Windows (in a Parallels VM on the same Mac) I could (and still can) access the device, switch it back and forth between OS X and Win, and send commands to it using a terminal SW.
QuickTerm didn’t list it, only the Bluetooth Port + Modem). I’m on Mavericks (10.9.5) and fighting with a USB device with a “FT232R” chip (from FTDI) for USB to serial conversion.