Is there a layout button or any alternative?
Layouts are on the list of things to implement on Mac. You can follow its progress here:
http://mcneel.myjetbrains.com/youtrack/issue/MR-558
Also see this list of things that are available on Windows but not yet on Mac:
http://wiki.mcneel.com/rhino/mac/rhino5wincommandsnotinrhino5mac
This would be a high priority one for me!
If would be interesting to know for reference, of the features in this list,
http://wiki.mcneel.com/rhino/mac/rhino5wincommandsnotinrhino5mac
Where each feature fall here:
“Some commands are planned for addition, some have Mac-appropriate counterparts, and some are not on our roadmap.”