Hi, One of our Macs has 2GB memory. Mavericks was a real success on this machine, but I have yet to understand what the color means. On this machine the color is always yellow (never green). Used memory could be below 2 gig, no swap file, but still yellow. Also what is the definition of the actual hight of the pressure line? On the other machine with more mem the line has higher amplitude, but it is still green even tho it actually swaps now and then. So one machine, no swap, yellow color and another machine has small swap, but color is green. It makes no sense. I have read all about Mavericks memory management i can seam to find, but there is no info about the actual color coding. Im sure Apple don't want me to bother and just chill but i want to understand the system. Anyone?