Affecting Gamma Levels

[Town Idiot25]

Hello! I am trying to do the following tutorial. I have a mac, so the program mentioned at the bottom of the tut is not available for me. Is there anything I can do to get this preferred result? All mac programs I try to find I could only get to REMOVE the gamma of the png completely, not customize it.Thanks!-Town Idiot25

 

[the cute]

Hello there
There is an alternative for tweakpng in mac systems it's called "GammaSlamma" and here is a link to downlolad it :
http://www.tdfast.com/macdld/GammaSlamma-1.1.dmg
hope that's will work for you ..
Good Luck