shall we copy excel on all the machines of selenium grid

I am facing a problem. I am good in selenium webdriver. Now i wish to run my datadriven test cases on mac,linux and other machines. my window machine will be my hub. shall i need to copy excel files of my data driven test cases on each machine(say node).? As mac does not support my xls(not intalled office). Or grid will only fetch data from my machine's xls files and run test on all different mac machines.?