I'd appreciate if someone could suggest some guidelines to maintain a stable system from memory perspective. My system: Mac mini 2011 server running 10.8.3 (I do not use the server app) Hard drive: 132gb of 500gb available Memory: 10gb I recently upgraded from 4gb to 10gb and yet recently the system slowed down substantially. Free memory was less than 1gb. After I restarted the mac, free memory went upto over 5 and as I monitor it slowly creeps down to the below. The things that I think that may be memory intensive are 1. XBMC 2. Safari and Firefox 3. Total spaces which is a desktop management app. It is running 5 desktops. I guess my questions are: * Do installed apps that are not running still consume memory * Why do I slowly loose memory over time, even if I close apps. * Any suggestions or ideas would be great. PS. I am not using photoshop, FCP etc. I do have a reasonable number of small utility style apps as you can guess by the length of the scroll bar. I also do run onyx once a month. Thanks, appreciate your help.