I thought I have 16GB ram, so running a 4MB excel spreadsheet should not be any problem at all, but it seems this rMBP lets me down... it's extremely slow .... I've a dell desktop also comes with 16GB ram, and it opens/edit excel real fast
here is my rMBP: 2.2 i7/16GB/256GB Yosemite
here is my rMBP: 2.2 i7/16GB/256GB Yosemite