Trouble printing an information card

Is you printer capable of printing without borders. Can the image and paper be identical in size. Is the print without any white borders and is the paper the correct size physically? Scale to fit may scale down the image to print within the printable area on the paper.

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What do your Canon Pro-100 device driver setting look like. Can you capture your printer settings? Use the Printer setting button in Photoshop's Print Dialog after you select you Canon Pro-100 as the printer to print on to open your Canon Pro-100 settings. Are there scaling options in there?

With the Printer setting I see I can see there is a scaling feature but it not checked.  I can not tell if it is a photo printer for I see no Paper Type selection available or and Photo print quality setting or color management option.  In your Photoshop Print dialog I see a paper Profile setting and Photoshop will handle print colors. Was that profile installed for your canon printer? It also looks like the Printer driver set there is some unprintable area on the top of the paper look at the preview.   Photoshop's document  scaling is not checked and the height is a full 5" and the width almost exactly 7"

You also us a Mac I may be JJMack i use windows.   You can see my Epson 4800 is a Photo Printer it has no scaling option  but has Paper type setting, Color management setting which I set off and have Photoshop handle color and a Print quality setting.

Perhaps some Mac user can help you. All I see is some unimportant background color mat not print across the top of the paper.