http://forums.macrumors.com/showthread.php?t=1837084 This is why I downgraded, if anyone can help me on that thread it'll be really appreciated as well... So,from what I see 10.9.4 has memory issues on my mac? I'm sure this is common, but app called 'clean memory' always shows only 4-10% memory free, and keeps on refreshing itself...and after cleaning it shows at the most 29% free ram >>>>this is with NO applications open apart from finder ,which isn't an app. Does 10.9.5 solve this? Can I count on it to not increase the number of issues I have? What issues does it have? Should I upgrade or is this one more stable? Thanks a lot..