I'm running a MBA 13 2009 with yosemite 10.10.5 in it.. its gone better now, especially with memory management. but I'm getting a bit annoyed with its fan. as its running very fast and creating noise. though, its at a tolerable level. still, i want it to run silently. here is a photo of my activity monitor. its not consuming so much memory. the left side of the macbook is warm to touch but not very hot. can anyone help me fix the fan issue. newbie to the macworld.