Hi Luke,

In AutoCAD for Mac 2015:

1/ To disable Display printable area:

At the command prompt type: (setenv "ShowPaperMargins" "0") and hit Return:

Command: (setenv "ShowPaperMargins" "0")
"0"
Command:

2/ To disable Display paper background:

At the command prompt type: (setenv "ShowPaperBackground" "0") and hit Return:

Command: (setenv "ShowPaperBackground" "0")
"0"
Command: 

Than at the command prompt type: (setenv "ShowPrintBorder" "0") and hit Return:

Command: (setenv "ShowPrintBorder" "0")
"0"
Command:

Than Restart AutoCAD or reopen currently opened drawings in order the new settings take effect.

3/ Show Page Setup Manager  - disabled by default in AutoCAD Preferences:

4/ To disable Create viewport in new layouts - use the same tab of AutoCAD Preferences window as shown above - uncheck "Create viewport in new layouts"

Maxim