Canon MG2540S/MG2545S Printer QuickStart for Mac 10.12 Sierra
The Mac Tutorial Shows You Step-by-Step How-to Download and Install the Canon MG2540S/MG2545S Series Printer Drivers and QuickStart Scanning on Mac OS X 10.7-Lion/10.8-Mountain-Lion/10.9-Mavericks/10.10-Yosemite/10.11-El-Capitan/10.12-Sierra Unix/BSD Desktop.
If the Canon MG2540S/MG2545S driver for you mac os x version is not available you can install that for Mac OS X 10.6+ without problems.
Because the latest Canon MG2540S/MG2545S Driver release is still Installable and Effective Up to Mac OS X 10.12 Sierra.

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Download Canon MG2540S/MG2545S Printer Mac OS X Driver:
Get the MG2540S/MG2545S Printer CUPS Driver.
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Double-Click on .dmg Canon Archive
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Run the Canon Driver Package
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Mac Sierra Solving Package from Unidentified Developer Issue:
Also Right-Click on Package & Open.
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Accept the License and Follow
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Click on Install and Confirm for Installation
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How-to Get & Install MG2540S/MG2545S Scanner Mac OS X Driver: