I am unable to print from QB Message says "Printing failed. Please check your printer and try again"
I want to make sure you're able to print in QuickBooks Online, @wabvet.
When experiencing unexpected behavior in QuickBooks Online, we recommend clearing the browser cache. If the browser's cache becomes too full of older data, it can potentially cause performance errors. Clearing it will force the system to refresh and get everything back to running smoothly.
You can also use other supported browsers to access your QuickBooks Online account so you’ll be able to print.
Yes, your OS High Sierra does support QuickBooks Online printing. To isolate why you still get a prompt message, let's try to print pictures directly from the browser to verify if you get the same message.
However, if the issue persists, I'd suggest contacting an IT expert. They can check the error and provide you further troubleshooting steps to resolve this,
Also, QuickBooks Online is dependent on your browser's printer settings. You can utilize the troubleshooting steps for the Safari browser in Mac, please see this article for the steps: Troubleshooting printing problems in Safari.
You can also read this article for additional references when recording and printing your checks: