https://opensource.apple.com/source/IOGraphics/IOGraphics-45.3/IOGraphicsFamily/IOBootFramebuffer.cpp This file is used for the frame buffer in Mac OS 10.2. There is no mention of the endian format for the pixels. That seems to indicate an oversight on Apple's part.
http://www.mcamafia.de/pdf/ibm_vgaxga_trm2.pdf This file is the specifications to the VGA standard. It makes no mention of pixel endian format. There is no mention of bit order in the specifications. It's probably assumed to be little endian.
