Video Presentation Computer Suggestions

SPECS NEEDED FOR PROPRESENTER

OS: Mac OS X 10.9 (Mavericks), 10.10 (Yosemite), 10.11 (El Capitan), 10.12 (Sierra), or 10.13 (High Sierra)
Processor: 2.4 GHz Intel Core 2 Duo processor or better
RAM: 4 GB RAM (8 GB recommended)
Graphics: While not required, a dedicated graphics card with 1GB VRAM is recommended, particularly if playing back a wide variety of HD video files
Stage Display: Additional output required for stage display function (third video out – PCI or USB). Only the Mac mini and MacBook Air lack a third video out port.

COMPUTER & KEYBOARD

I would choose the $999 configuration and add the Apple Keyboard.

Check BHphoto.com for better pricing and great selection. The same model as above is here. This one is not quite a powerful, but exceeds current requirements for a much better price here.

MONITOR

I like a big monitor for this, but a smaller one will also work. I read several reviews of people using these monitors with Mac Mini with high ratings.

Samsung 32″ WQHD LED Monitor (S32D850T) $389.23

MOUSE

You can purchase the Apple Mouse with the computer for $79.00. I personally do not like the Apple Mouse. I would prefer a mouse like this one. Batteries last about two years in these.
Logitech M510 Wireless Large Mouse, Black $17.99

ADDITIONAL VIDEO OUTPUT ADAPTER

If you can run ProPresenter Stage Display on the back monitor (will need separate monitor input for rear projector), then you will need this adapter. if all three screens HAVE to be identical, you will not need this.

NewerTech USB 3.0 to HDMI Video Display Adapter $47.45