Some (12) of the iMac computers in C-117 are equipped with a program, Parallels.   Parallels creates a virtual machine (VM) which emulates (pretends to be) a PC running Windows 10.  This allows the iMac to run Windows software, like Reaper and Show Cue Systems.

Detailled below are the procedures to startup and shutdown a VM, and to connect the USB Audio Device to Windows. 

Failure to follow these procedures may render the iMac frustratingly unresponsive.

Power-up the iMac (if necessary) by pushing the Power Button on the rear left of the display.

The OS X Desktop, similar to this should appear.

Log into OS X (the iMac Operating System) as:

NAME: “theatre”
PASSWORD: “theatre”

Double-click on the Parallels Desktop  icon in the OS X Dock (bottom right corner).

A  window similar to this one should appear.

Click on the Windows 10 x64 Start button to launch a  virtual machine.

The Windows 10 desktop similar to this will appear.

You can now run Windows programs as if you were working on a dedicated Windows computer.

At this point, if you plug your USB key into the iMac, this window will appear.

Choose "Windows 10 x64" to use you key with windows, Reaper and SCS.

If you hold down the "ALT" key while clicking, Parallels should remember your choice in the future.

In order to make the Focusrite Scarlett 2i2  Sound Device available to the Windows VM, you need to perform the following steps.

Move the mouse to the top border of the screen and hover there until the Windows 10 x64 menu bar appears.

Click on “Devices”.

 Scroll down the list to “External Devices”.

Select “Scarlett 2i2 USB" to connect it to the virtual machine.”

Sound from Windows programs like Chrome, Reaper and Show Cue Systems will now be sent to the headphone jack on the 2i2, rather than to the speakers on the iMac display.

Close any Windows programs you have been using. (ALT- F4)

Click on the Windows 10 Start button (bottom left corner). 

Click on “Shut down”.

Windows will shut down and a screen similar to this one should appear.

Move the mouse to the top border of the screen and click on “Parallels Desktop”.

Scroll down the list and click to select “Quit Parallels Desktop”.

Or type "COMMAND Q"

The OS X Desktop, similar to this should appear.