I am a long time Windows User, but newbie on OS X

This is a wonderful OS I use.

I have a macbook pro with 500GB HDD inside.

I want to one HDD install both OS X 10.8.5 and OS X 10.10.2, plus one more partition for save data, so when as need, I format any two OS X partition will not data lose... (So Total 3 partition base on my case there).

But I search APPLE official KB, not find any document as example like my case, just only see how to install the OS X on ext HDD only (Not the way I want to be).

So .... anyone can tell me how to do above? OR can it?

MacBook Pro, OS X Mountain Lion (10.8.5)

  • How you proceed depends on a few things. What model of MacBook Pro do you have? Do you currently have an OS installed on the internal hard drive?
    – Mr. Mel
    Feb 5 '15 at 2:11
  • The partitioning & install should be easy - see Disk Utility, in Applications/Utilities. Make sure you have a backup just in case. The difficult part might be getting hold of 10.8.5. Unless you already 'bought' it from the App Store, there's no way to get it from Apple.
    – Tetsujin
    Feb 5 '15 at 7:39
  • @JimmyChan Please also add the fill level of your HDD and do you have an external hard disk?
    – klanomath
    Feb 5 '15 at 8:44
  • I am using 2010 Mid 15"
    – Jimmy Chan
    Feb 6 '15 at 5:27

I final do this with disk utility, then partition with 4. Each with different name etc such as OS X 10.10, OS X 10.9, OS X 10.8 etc.

Then make the USB stick install OS X one by one and when installing choose install to which partition.

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