After I quit using a color calibration spider, I started using the rudimentary calibration software in my I Mac

New I Mac and system ..I can't find any way to calibrate my I Mac ,used to be a rudimentary calibrator that took through each color and grey scale. I'm doing some publishing work and I need to get my monitor set ups I can proof my photos. Anyone know of a plug software I can use to get this thing closer. Maybe the calibrator is still there and I just can't find it? thanks