From Canon UK:
The software items that are experiencing compatibility issues with macOS 10.12 (Sierra) are listed below:
Software | Version | Issue | Estimated Release of Updated Software |
Map Utility | 1.7.2 | The USB connection with the GP-E2 is not functioning | End of December 2016 |
Camera Window DC | 8.10.5a, 8.10.5b, 8.10.7 | Connection via USB or Wi-Fi is not functioning | End of December 2016 |
EOS Utility 2 | 2.14.20a | Connection via USB is not functioning | End of January 2017 |
EOS Utility 3 | 3.5.0 | Connection via USB is not functioning | End of December 2016 |