If you own a Mac and want to print photos on a dye-sublimation printer, do not update to the latest operating system! This is because the printer drivers currently only support operating systems up to Mac OS X 10.14 Mojave. This currently affects all printer models from all manufacturers. Although CANON, CITIZEN, DNP, HITI, MITSUBISHI, SINFONIA, and others are working hard to update their printer drivers, it may still take weeks or months before this work is completed and functional drivers are available. And there is concern that the drivers will only be updated for newer printers, which means that some older—but still fully functional—devices may be left behind.
Unfortunately, there is currently no official workaround for any of the thermal photo printers on the market, so as a Mac user, you’ll have to wait to update to the latest OS X until an updated printer driver is available for the model you’re using. If you’ve already installed the update, your only option is to downgrade using your most recent backup (Time Machine).