no need to change OS sa mac tropa. merong boot camp assistant ang Mac madaling mag dual boot sa Mac. just click boot camp assistant, configure how much space you'll give the other OS in the partition, click next, find the ISO file of the OS that you've downloaded and you want to install. wait till the installation is done and boom. you have a dual-boot macbook. it's very easy even a non-tech dude can do it.Di ko recommended paps na magchange OS ka ng Macbook mo kasi baka magkaroon ng performance issues, pero i-consult mo lang din sa magaayos or research ka lang