Canon released 
about a month ago a free tool that turns a whole range of Canon's EOS DSLRs and mirrorless cameras (as well as three PowerShot compact cameras) into high-quality webcams - but only on Windows.
Now Canon has kept its promise and has also released a macOS version (still as beta version). The tool should help all users who need virtual meetings to communicate with colleagues in times of corona lockdowns and home office work and need better image quality than many USB or notebook integrated webcams can provide.
With the help of the EOS Webcam Utility (for macOS 10.15 (Catalina), 10.14 (Mojave) and 10.13 (High Sierra)), an EOS camera connected to the computer via USB can be used via the web interface - however, it is not available as a webcam system-wide, but only in corresponding live streaming or video conference tools such as Skype, WebEX or Zoom
via Google's Chrome Browser (but not the corresponding apps). Unfortunately it cannot be used via FaceTime or Safari Browser.
Selection of the EOS Webcam Utility as image source
Owners of an EOS camera can thus do without an extra capture box or special commercial software to use their Canon camera as a webcam. The following video explains how to install the software, set up the camera and then use software such as Zoom or Skype as a webcam in a corresponding online video conference. A version for macOS is in work and will be released soon.
Here is the list of supported Canon EOS cameras:
EOS DSLR cameras
EOS-1D X Mark II/Mark III
EOS 5D Mark IV
EOS 5DS (R)
EOS 6D Mark II
EOS 7D Mark II
EOS 77D
EOS 80D
EOS 90D
EOS SL2/SL3
EOS T6/T6i
EOS T7/T7i
EOS T100
Canon EOS-5D Mark IV
EOS Mirrorless Cameras
EOS M6 Mark II
EOS M50
EOS M200
EOS R
EOS RP
PowerShot Cameras
PowerShot G5X Mark II
PowerShot G7X Mark III
PowerShot SX70 HS
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