How to increase memory in LaTeX compiler for handling larges figures in MATLAB2TikZ?

For MAC:

In the “texmf.cnf” file in: Macintosh HD/Library/TeX/Root/

add the following lines at the end:

main_memory = 10000000
save_size  = 10000000
extra_mem_top = 150000000     
extra_mem_bot = 150000000 

Then open a terminal window and type: sudo fmtutil-sys --all 


References: 
http://tex.stackexchange.com/questions/7953/how-to-expand-texs-main-memory-size-pgfplots-memory-overload

http://tex.stackexchange.com/questions/67014/latex-gives-me-the-error-ouch-my-internal-constants-have-been-clobbered

http://www.nburles.co.uk/latex/increasing-the-main-memory-of-latex