Skip this section if you want to install the VCP driver. Scroll down a little, you will see a table of available USB drivers:īeware that there are different drivers: one is for Mac OS 10.9 “Mavericks” or later (circled), and the other is for Mac OS 10.3 to 10.8.

The USB driver can be found on this web page. If SuperLab 5 (or other software you use) is capable of communicating with the response pad, then you are set.Ĭonnect the response pad to the Mac’s USB port. Starting with macOS 10.11, Apple started providing its own compatible USB VCP driver. Skip this section if you want to install the D2xx driver. SuperLab version 5 or earlier, version 1 of the XID libraries, and E-Prime.

▪ Use VCP driver with all other software, e.g.

▪ Use D2xx driver with SuperLab 6 (or later), SuperLab X6, Xidon 2, and version 2 of the XID libraries (C++ and Python).

The choice depends on which application software you want to use:

On macOS, these two drivers are unfortunately mutually exclusive: they cannot both be installed at the same time. But it offers much improved timing: a fixed 2 millisecond delay with zero milliseconds jitter.

▪ D2xx : This driver is specific to the USB interface chips (made by FTDI) that are found in our response pads and in StimTracker.

Timing resolution is estimated to be about 5-6 milliseconds. This enables a wide range of software to work since a lot of it was written to support serial ports. When installed, the driver makes macOS think that your Mac has a real serial port.

There are two different USB drivers available for the Mac:

Mac universal usb installer