Laptop support or legacy USB support?

N00b question. As the title suggests, I don't know which one to select. I am installing unibeast onto a USB drive from my late 2012 MacBook Pro and this is the build that I will be installing OS X on. PCPartPicker part list / Price breakdown by merchant

Type	Item	Price
CPU	Intel Core i5-4690K 3.5GHz Quad-Core Processor	$219.98 @ OutletPC
CPU Cooler	Noctua NH-D15 82.5 CFM CPU Cooler	$99.99 @ Newegg
Motherboard	Asus Z97-A ATX LGA1150 Motherboard	$136.98 @ OutletPC
Memory	Corsair Vengeance LP 16GB (2 x 8GB) DDR3-1600 Memory	$164.99 @ Amazon
Storage	Western Digital Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive	$51.85 @ OutletPC
Video Card	Gigabyte GeForce GTX 970 4GB WINDFORCE Video Card	$359.99 @ Amazon
Case	NZXT Phantom 530 (Black) ATX Full Tower Case	$119.99 @ Amazon
Power Supply	Corsair RM 650W 80+ Gold Certified Fully-Modular ATX Power Supply	$79.99 @ Newegg
Optical Drive	Asus DRW-24B1ST/BLK/B/AS DVD/CD Writer	$18.75 @ OutletPC
Operating System	Microsoft Windows 8.1 - 64-bit (OEM) (64-bit)	$89.98 @ OutletPC
Monitor	Asus VG248QE 144Hz 24.0" Monitor	$271.99 @ B&H
Keyboard	Cooler Master CM Storm Quick Fire TK Wired Gaming Keyboard	$83.98 @ Directron
Mouse	Logitech G502 Wired Optical Mouse	$59.99 @ Amazon
		Total
	Prices include shipping, taxes, and discounts when available	$1758.45
	Generated by PCPartPicker 2014-12-24 11:31 EST-0500

In confusion, I didn't select either of the options and just hit continue. The loading bar didn't move for 25 minutes, and since the tutorial tonymacx86 said it should be a 10-15 minute wait, I cancelled it. Any help would be great, thank you.

submitted by StraightComet

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