usb to serial adapter driver for mac os x

Leave Keyspan Serial Assistant in your Applications folder since you may need it to refer to these names in the future.

It has been successfully tested and verified to work using an Apple ImageWriter II in OS X versions from OS X 10.2 Jaguar through OS X 10.10 Yosemite (see the Appendix regarding later macOS versions).

Sections may also be adapted for the StyleWriter or other serial printers.

Serial interface solutions other than the Keyspan Tripp-Lite adapter are discussed in Related User Tips found in the Appendix but they require installing the necessary drivers discussed in the document, as a prerequisite.

How to use this document Before proceeding with any installation, please read this entire User Tip including the disclaimers that appear at the end.

Usb To Serial Adapter Software This Site

This is an apparent limitation of the software this site uses.

Readable URL addresses have been incorporated that way intentionally, so that the user may confirm they are not redirecting to some undesired site.

For OS X Lion and later, Gatekeeper settings may prevent opening packages downloaded from the sites described in this document.

To temporarily bypass Gatekeeper settings hold a control key while opening installer packages, select Open from the contextual menu, read the disclaimer and then click Open.

This security feature should not be bypassed indiscriminately.

For more information about Gatekeeper please refer to the Appendix at the end of this document.

Keyspan USB to serial adapter driver installation Keyspan USA-28x product page: (link updated 9-2018) Navigate to and download the driver appropriate for your system (firmware drivers Keyspan products).

Usb To Serial Adapter Mac OS 8

The product has been discontinued but drivers remain available for OS versions from Mac OS 8.6 through OS X 10.8.x.

Use caution to select the appropriate driver for your system.

Lion and later OS versions require the 64 bit drivers contained in version 2.6.x.

Their latest driver (version 2.6.4) has been tested and verified to work with all OS X versions through macOS 10.12 Sierra.

Disconnect the Keyspan adapter from your Mac.

If you do not disconnect the adapter, the installer package will crash.

Open the downloaded zipfile to expand the keyspanUSAdrvr installer package: Read the Important Information, authenticate when necessary, and complete the installation.

The Keyspan driver is a kernel extension necessary for the Keyspan adapter to work.

With the adapter connected and its driver correctly installed, the kernel extension will now appear in System Information as KeyspanUSAdriver: If Yes does not appear under Loaded adjacent to KeyspanUSAdriver then restart your Mac to load the driver.

After the driver is loaded an alert may appear indicating that new network interfaces were detected and need to be configured.

You may ignore this alert, and you may delete the three Keyspan network interfaces that will now appear in System Preferences Network: OS X seems to think these are dialup modem drivers.

Delete the interfaces by selecting them individually and clicking the (minus) button.

When the adapter has been connected its serial port names will appear in this window.

Clicking the reveal triangle will show their names (drag the windows right edge or lower right corner to resize it and reveal its port and status information): KeySerial1 is an alias to the first port found with a Keyspan adapter connected to the Mac.

The names USA28XxxxxP1.1 and USA28XxxxxP2.2 will change if the adapter is connected to a different USB port.

Connect the ImageWriters Peripheral - 8 cable to Port 1 on the adapter, and use KeySerial1 for the serial port name.

Otherwise it will be necessary to change the name of your serial port every time you change which USB port the Keyspan is using.

Usb To Serial Adapter Driver For Mac Os X