For a Macintosh package that supports Tektronix Graphic terminal emulation,
check VersaTerm-PRO from Peripherals, Computers and Supplies. It emulates a
Tektronix 4105 terminal. Also note that many of the applications that provide
a Tektronix 4107 terminal driver also provide Tektronix 4105 terminal driver.
For more information, search on "Tektronix" and "Peripherals, Computers, and
Supplies."