To create a GEDCOM using RootsMagic, choose Export GEDCOM file... from the File menu.
Choose the destination for your GEDCOM (General is the default option. If you need your GEDCOM for TempleReady then click on the drop down box and choose TempleReady.)
Select what you want to include and press the Export button.
Choose a destination folder in the drop down box to the right of Save in:.
Enter a file name and click Save.