Problem summary
When using the ZDefocus with the 'Use GPU if available' checkbox checked, the viewer will display pixelated artifacts which do not appear on other Mac OS versions
Customer reported version
nuke.9.0v9
Customer reported platform
10.12
Steps to reproduce
1. Open Nuke on OSX Sierra
2. Read in footage with z data (I have attached the file tested)
3. Add a ZDefocus node and view it
4. Ensure 'Use GPU if available' is checked on
Result: pixelated artifacts will appear
Workaround
Turn off 'Use GPU if available'
Use an older version of OSX than Sierra
Reproduced by support
Reproduced on OSX 10.12 Sierra in Nuke10.0v4, 10.0v1, 9.0v8
Issue not apparent in Nuke8.0v6
Expected behaviour
no artifacts
Actual behaviour
artifacts in the viewer