Canon EOS-1D X Mark III DSLR Camera (Body Only) - Manual (Page 49)

1.
Download the software.
Connect to the internet from a computer and access the following
Canon website.
https://cam.start.canon/
Select your country or region of residence and download the software.
Depending on the software, you may need to enter the camera's serial
number. The serial number is on the bottom of the camera.
Decompress it on the computer.
For Windows
Click the displayed installer file to start the installer.
For macOS
A dmg file will be created and displayed. Follow the steps below to
startup the installer.
1.Double-click the dmg file.
• A drive icon and installer file will appear on the desktop.
If the installer file does not appear, double-click the drive
icon to display it.
2.Double-click the installer file.
• The installer starts.
2.
Follow the on-screen instructions to install the software.
49