Hi danjohill,
Since you have upgraded your operating system, we recommend installing the drivers and software for the printer from the Canon USA website to ensure you have the latest version of all items installed. This will give you the toolbar function back as well. Please click here to go to the Drivers and Software page for the PIXMA MX860. Once on the initial download page for your model, please do the following:
1. Verify that the operating system detected in the "OPERATING SYSTEM" drop-down menu is correct, and if it is not, please click the drop-down menu to select your operating system.
2. Next, please click on the red arrow next to the "RECOMMENDED FOR YOU" section and click the MINI MASTER SETUP file. When you do, a red DOWNLOAD button will appear. Please click on the checkbox below the DOWNLOAD button, then click the red DOWNLOAD button to begin the download. The time for the download process may vary depending on the speed of your Internet connection and the size of the file being downloaded.
Once you have downloaded the Mini Master Setup file, please follow the steps above to also download the rest of the software for the printer, except for in Step 2 you will want to click on the red arrow next to the word SOFTWARE to display and download the software.
Once all items are downloaded, please double-click on the items and follow the prompts that appear to install them on your computer.
Hope this helps!
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