I use SU Make on an iMac and would like to print 1:1 scale drawings on my Cannon Pixma printer
See these links:
How do I print to scale? — SketchUp Help
This article is for SketchUp on Windows OS but may be of some help.
Printing to Scale — SketchUp Sage Tutorials
You might also have a look at these: They are old but still valid.