Installed new hard drive, but cant install software!

Installed new hard drive, but cant install software! I used ifixit.com to help me install a new hard drive in my mac book pro a1226, but now when I try to re-install the operating systems it wont work. I dont know what to do.
Asked by: Guest \| Views: 336

Total answers/comments: 2

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bert [Entry]

I replaced my hard drive in MacBook but I do not have the operating disc. will I be able to get the operating system from the old hard drive as a external hard dive ?

bert [Entry]

I'm operating my mac off the old hard drive as an external one. the new one that I installed will not reconize the operating system from external one. I do not have the start up disc. how do I get the operating system to my new hard drive?