macOS Sierra AMD Radeon 6770M 512Mb
Worked: blender 5db8ac9
Short description of error
In Mesh Edit mode:
Circle select Tool don't respect "Limit Selection to visible" toggle.
Tool always select polygons only by clicking on center and may to select invisible polygons from other side.
If switch to vertex/edge selection and select some elements, circle select begins to work normally in the face mode.