I have MacBook Pro 13-inch, Early 2011, Processor 2.3 GHz Intel, 4 GB Memory. Running OS X 10.9.5. I would like to ask how to fix/lean up my macbook pro. I am extremely disappointed in recent year or two. I am Mac user since the old days of white plastic MacBooks with PPC processors and 10.2 OS X. I migrated out from Linux. I loved the Unix-based OS with open source components, very much alike to my previous Linuxes. I am not programmer, but I loved Apple “Linux” disto with the support of a strong, corporate player, making sure that everything worked, with no need to compile 3rd party drivers to support things, like waking up from closed lid, working Wifi, and, most importantly the flawlessly working hardware. It was better than linux and better than windows. Over the years, i migrated my data to few newer Macs, and the OS X evolved. I used to love it, as I said, for being swift, sane, unix-based, rock solid, never saw blue screen, yet with nimble and comfortable UI. What I have now is sluggish, super slow, irrational system, with limited access to underlying unix, but with self bloating like on old Windows XP. It seems to know better want I want it to do, and I hate it. It seems to be slower every day, with the infamous beachball as the most common feature, with often non-responsive computer, waiting for something (divine intervention?). How can I get back swift and nimble OS with OS X? Should I get me Ubuntu? How can I remove everything and do something like fresh/clean install? Does it even make sense? Would it be solution? Will it work fast? Responsively? Is there a way to have some “selective” or “manual” migration? I would like to keep my old photos, and my old mp3s, which I have imported to my iTunes, but no legacy crap, nothing to slow me down. 15 years of favorites, cookies, and what not from web browsers, I do expect it to slow me down. Not needed. Old Apps, which I did not started for years? No. Kernel Extensions. No. I want my super responsive and fast OS X. What is the best way to get there ?! Anyone? I anticipate to use my mac primarily for web browsing, mail, VLC to play movies on my TV, iTunes, and Skype. No rocket science. I do have another computer for computing, say multi physics simulations. to sum up, 1/ how do I do clean install on my mac? I do not have physical media for 10.9 or recent 10.11. Will it even help for speed? 2/ How do I selectively import certain data only? Mails, iTunes, iPhoto? What can be removed from clean install to gain speed and responsivity?