Updating the driver didn't work for me.
I contacted Dymo support and they gave me the steps that did work, and my 450 Twin Turbo is now up and running on Yosemite 10.10.3:
Please be advised that before an upgrade of the DYMO Label Software of any sort it is important to uninstall the previous version of the software (before doing that it is advisable to save any address books or saved labels on a USB or an external hard drive). The device has to be unplugged from the PC during the installation of the new software and should only be plugged back after the installation prompts you to do so (in case of Yosemite it is best to do an additional reboot before plugging it).
I would normally recommend making a reinstallation of the software however we need to make sure that the device is functioning correctly.
This is why I would ask you to follow the steps below:
-Unplug the device from the PC and the mains for at least 1 minute;
- After you plug it back press swiftly the front feed button to check for transport â a single blank label should advance;
- Try to make a Self-print test by doing the following:
⢠Press the front-feed button for at least 20 seconds - once the labels start printing and you have at least 3 fully printed labels
⢠Press the front-feed button swiftly once more to stop the printing
If all works fine you should have lines that gradually intensify in colour on the labels, later there will be triangles and other patterns.
-Then you can try to print out a label once again.
If that does not work, but the print test and the one label check had gone as they should please proceed with the following:
Download the .zip file located here: http://dymo.li/lwttupdate and then follow the instructions given below:
1. Quit the Dymo Label Software application
2. Download .zip file from link above to your Mac computer.
3. Open .zip file and launch the âTwinTurboUpdaterâ application.
4. Connect the LabelWriter Twin Turbo via USB to the Mac.
5. The âUpdateâ button should now be activated.
6. Press âUpdateâ button.
7. A confirmation of Update should be displayed on the screen.
8. Turn off the printer for 10 seconds by removing power and USB cable.
9. Plug the printer back in with first power and then USB cable. Do note that it is possible that a ânewâ printer gets added to the system since the serial number was âfixedâ.
10. Open up Dymo Label Software and make a test print from the ânewâ printer
If the above does not help resolve the issue please do not hesitate to contact our colleagues and ask for their assistance.
I hope the provided information proves useful.
Have a wonderful day.
Warm Regards,
Teodora
But honestly, every time there is a new OSX version hoops have to be jumped through to make this little gizmo work. I am thinking of giving up Endicia Mac and just putting it on my win 8.1 machine... đŽ