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Apple's line of laptops for professional and power users. To date, the MacBook Pro line includes 13, 14, 15, 16, and 17-inch variants, with major revisions defined by Pre-unibody(Original), unibody, Retina display, Touch Bar, and SOC (system-on-a-chip) designs.

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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.

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Can you give more details about what exactly isn't working? What steps are you taking and where are things breaking down?

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Yes, the more specific details you can provide, the more likely it is that someone can provide a helpful answer. In particular, please let us know what method you're using to install the new operating system, how far you get into the installation process and exactly what happens when it fails.

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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 ?

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Post this as a separate question

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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?

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If it didn't recognize the external you wouldn't be operating my mac off the old hard drive as an external one

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