Only seeing half of my image

https://www.youtube.com/watch?v=LFCUogEG7tM

Not sure if this will help, but it's what I used to get set up. Not on a Mac though.

Can you list your OS version, system specs, and GPU driver version?

Thank you all for responding. I have the DK 1. and no luck so far
Here are my specs ( and not sure how find graphics driver ). Also the odd thing is the config demo works correctly but no other demo seems to work.. I.E. Tuscan and Tittans

Model Name: MacBook Pro

Processor Name: Intel Core i7
Processor Speed: 2.5 GHz
Number of Processors: 1
Total Number of Cores: 4
L2 Cache (per Core): 256 KB
L3 Cache: 6 MB
Memory: 16 GB
Boot ROM Version: MBP112.0138.B11
SMC Version (system): 2.19f12


NVIDIA GeForce GT 750M:

Chipset Model: NVIDIA GeForce GT 750M
Type: GPU
Bus: PCIe
PCIe Lane Width: x8
VRAM (Total): 2048 MB
Vendor: NVIDIA (0x10de)
Device ID: 0x0fe9
Revision ID: 0x00a2
ROM Revision: 3776
gMux Version: 4.0.8 [3.2.8]
Displays:
Color LCD:
Display Type: Retina LCD
Resolution: 2880 x 1800 Retina
Retina: Yes
Pixel Depth: 32-Bit Color (ARGB8888)
Main Display: Yes
Mirror: Off
Online: Yes
Built-In: Yes




Display
Retina display: 15.4-inch (diagonal) LED-backlit display with IPS technology; 2880-by-1800 resolution at 220 pixels per inch with support for millions of colors
Native resolution: 2880 by 1800 pixels (Retina); scaled resolutions: 1920 by 1200, 1680 by 1050, 1280 by 800, and 1024 by 640 pixels


Processor
2.2GHz
2.2GHz quad-core Intel Core i7 processor (Turbo Boost up to 3.4GHz) with 6MB shared L3 cache
Configurable to 2.5GHz quad-core Intel Core i7 (Turbo Boost up to 3.7GHz) with 6MB shared L3 cache or 2.8GHz quad-core Intel Core i7 (Turbo Boost up to 4.0GHz) with 6MB shared L3 cache.
2.5GHz
2.5GHz quad-core Intel Core i7 processor (Turbo Boost up to 3.7GHz) with 6MB shared L3 cache
Configurable to 2.8GHz quad-core Intel Core i7 (Turbo Boost up to 4.0GHz) with 6MB shared L3 cache.
Memory
16GB of 1600MHz DDR3L onboard memory
Storage1
2.2GHz - 256GB
256GB PCIe-based flash storage
Configurable to 512GB or 1TB flash storage.
2.5GHz - 512GB
512GB PCIe-based flash storage
Configurable to 1TB flash storage.
Size and Weight
Height: 0.71 inch (1.8 cm)
Width: 14.13 inches (35.89 cm)
Depth: 9.73 inches (24.71 cm)
Weight: 4.46 pounds (2.02 kg)2
Graphics and Video support
Intel Iris Pro Graphics
NVIDIA GeForce GT 750M with 2GB of GDDR5 memory and automatic graphics switching
Dual display and video mirroring: Simultaneously supports full native resolution on the built-in display and up to 2560 by 1600 pixels on up to two external displays, both at millions of colors
Thunderbolt digital video output
Native Mini DisplayPort output
DVI output using Mini DisplayPort to DVI Adapter (sold separately)
VGA output using Mini DisplayPort to VGA Adapter (sold separately)
Dual-link DVI output using Mini DisplayPort to Dual-Link DVI Adapter (sold separately)
HDMI video output
Support for 1080p resolution at up to 60Hz
Support for 3840-by-2160 resolution at 30Hz
Support for 4096-by-2160 resolution at 24Hz

Looks like you may be opening the game in the wrong resolution.

I'd recommend using either Direct Mode, or Extended Mode with the DirectToRift.exe version of the game.

Also, DK1 is 1280x800 if you are wondering.

Thanks again... I am using the resolution you mentioned. I am on a Mac... and have turned off mirroring. I think this is the only way to extend. That exe file won't work on a Mac. Any other suggestions?

Ah, yeah. I see you're on OSX. You can try to disable display cloning and make the Rift his primary monitor by dragging the white bar onto it in display preferences.