Sony has released firmware update 1.01 for the Sony a7C, this is now the latest firmware version for the a7C.
Firmware v1.01 Benefits & Improvements
- Fixes an issue where the information displayed in the viewfinder may not appear in the correct position.
You can download the latest firmware from your local Sony support website. The below links will take you to the correct page to download the firmware. Make sure that you download the correct firmware for your computer (Windows or Mac) and read the installation instructions.
For Mac users only macOS 10.14, 10.15 and 11 are supported. You also need to install the Sony Camera Driver first. Unfortunately the Sony Camera Driver is not supported yet with Apple M1 chips.
For Windows users 10 and 8.1 are supported.
Make sure your camera battery is fully charged and also use the USB cable supplied with the camera, other cables may not work.