There are 2 major ways to open an application in a Mac:
One is to click on the icon in the "Dock" (the bar of icons which is either on the side or the bottom of the screen):
![Mac docking bar](images/MacDock.png)
The other is to open the Applications Folder which will be on the hard drive (you'll see this icon in the upper righthand corner of the screen): ![Local hard drive icon](images/HardDrive.png)
Close this window/tab to return to the lab