Apple frequently changes security protocols. If you install the driver on a Mac but it won't open:
For the MG3122, which has long since been discontinued by Canon, the driver landscape presents a unique challenge. Unlike flagship professional printers that receive decades of software support, the MG3122 is a "legacy device." Users typically cannot rely on modern operating systems (such as Windows 11 or macOS Ventura) to automatically recognize and configure the printer via generic drivers. Consequently, the search for the correct driver becomes an archaeological dig into Canon’s support archives. Installing the wrong version can lead to "garbage printing"—a cascade of nonsensical characters or fragmented images—or the complete failure of the scanner unit. The driver must precisely match not only the model number but also the specific architecture of the operating system (32-bit vs. 64-bit) and the connection protocol (USB 2.0). canon mg3122 drivers