Canon EOS R6 Mark II firmware update

• Adds [Wi-Fi freq. band] to [Communication Settings], so you can choose 5 GHz or 2.4 GHz when moving from Bluetooth to Wi-Fi.
• Adds support for Canon's Software Development Assistance Kit (CCAPI).
• Fixes image transfers to an FTP server that could fail with Err41, and Err49 repeating with an SFTP server.
• Fixes the camera sometimes not being recognised when connected to a smartphone by USB.
• Fixes a horizontal line that could appear briefly in the viewfinder.
• Improves system stability.

1. Download firmware 1.7.0 for the EOS R6 Mark II from Canon's page (button below) and unzip it. The folder also has Canon's own instructions (PDF).
2. Format a memory card in the camera (this erases the card), then copy only the firmware file (R6217000.FIR) to the top level of the card, not inside a folder.
3. Insert a fully charged battery and the card, and turn the camera on.
4. Open the camera's setup menu, choose Firmware, and follow the screen to start the update.
5. Don't turn the camera off, open the card or battery door, or press buttons until the camera says the update is complete.

If you use Canon's Camera Connect app: after updating, delete the camera from your phone's Bluetooth device list, then pair them again.