Dear all I switched to mac before a year or so.but im still dont know many about this new environment (in deep). I have few questions I would like to ask, & seeking for your generosity in providing me the necessary knowledge. I recently bought Macbook pro (i7, third generation-non retina).it came with slow 5400 rpm HDD.i decided to buy SSD (SATA III), & to replace-it. Now, I read many posts about it is not wisable to clone from HDD to SSD using software like SuperDuper or CCCloner, due to different sector alignments & something like that..Instead, download a copy from apple store, & burn it to DVD.(but this method is not reachable for me at this time). I always prefer to perform clean install (in windows pc). My question about this matter is: My friend gave me old copy (on bootable DVD) of Mac Lion OS.(he downloaded before 1 year from the internet, from some warez software website ).he said that I can used this dvd to boot & install Lion on new SSD. But..is this early version from Lion will be compatible with new MBP? Meaning when he download this OS Lion, it was (Lion) designed for MBP with 2nd generation intel, & most important designed for READON graphic card, & 2.0 USB.while what I have is nvidia DDR5 with 1 GB with 3.0 USB. Is this will be compatible to install on my new mac? Also, is this Clean copy of Lion? No adds-on on it? No hidden mall software? No tweaking is made?(usually they do on windows), Please advice. Also please: Regarding SSD, I choose Kingston SSD with sata3..& this drive built in sandforce (I do not know what does this mean)..however, I read that many people advised to make Trim process after installing any new SSD on mac, while many others advised NOT to do so (to leave the drive as it is). What is the best approach please? Thank you in advance for given me some from your precious time.