Do you want to know what to do when your Mac freezes and runs slow? Well regardless all the efficiency and advancement, there comes a time when even your Mac machine performance is affected by certain issues. It is really a very critical scenario where users encounters several problems while performing even the regular operation on their Mac OS X computing machine. Under such unfortunate and calamitous circumstances the first thing strikes users mind is what to do when your Mac freezes and runs slow? However, there is no need to worry as you can fix the slow Mac performance issue quite easily now. In order to do you will need to remove all junk data from your hard drive and uninstall all unnecessary application from your program files. In case if the problem still persist then the only option to speed up your Mac is formatting hard drive and reinstallaiton of OS. Hard drive formatting will surely cause data inaccessibility issue in your system but with using Mac Data Recovery Software you can easily get back all your lost Mac data even after formatting hard drive as well.