The majority of “upgraders” to Lion did so using the Mac App store which doesn’t provide the facility to do a clean install. 2GB of memory should be considered the absolute minimum, many people are finding that for Lion to roar you will need at least 4GB. Lion requires a minimum of 2GB of RAM and a Mac with one of the following processors: Intel Core 2 Duo, Core i3, Core i5, Core i7, or Xeon processor. It sounds obvious but check your system meets Lions minimum requirements. After researching and testing a wide range of suggestions and fixes I have compiled a list of what I think are the 17 best ways to speed up your Mac running Lion. It is of course possible that Apple will fix some of these issues in a future update, however until then many users will search for ways to boost the performance of their machines. Since the release of Lion back in July its been subject to a number of criticisms, while some of these may not be justified, it is difficult to ignore the growing chorus of reports of performance issues after upgrading. Just like people Macs are prone to slowing down the older they get, but after recently upgrading to OS X Lion some users are protesting their machines have aged before their time.