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Mid 2012 model, A1278 / 2.5 GHz i5 or 2.9 GHz i7 processor.

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installing ssd but keeping old hdd

Hi I'm upgrading my hard drive to an ssd and I want to keep the hdd so I purchased a caddy to replace the disk drive since I do not use it. my question is do I out the hdd in the optical and out the ssd in the main? and when I figure that out can I just turn the laptop on and just partition the drives then use disk utility to download Mac os on the ssd? would that work? please get back to me thank you

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Do you have a MacOS install disk or USB Drive?

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usb drive yes

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bought one for this reason specifically

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To Keep the data from the old drive:

  1. Follow this guide, installing the SSD where the optical drive used to be.
  2. Boot into the MacOS installer by holding the option key .
  3. Go into Disk Utility from the installer.
  4. After telling the Disk Utility to “Show all Devices“, make a new partition on your SSD(call it Macintosh SSD or something different than the Hard Drive’s partition).
  5. On the SSD partition, click “Restore“ and choose the restore partition as “Macintosh HD“(or whatever your Hard Drive’s partition is named).
  6. After the “Restore“ process is finished, shut down the computer.
  7. Press the power button on the computer and immediately start holding the option key. Keep holding the option key until you get to the boot picker.
  8. In the boot picker, select “Macintosh SSD“(or whatever you named the SSD partition). If you don’t see Macintosh SSD, something has probably gone wrong.
  9. (Assuming you’re booted into the Macintosh SSD partition) Go into Disk Utility and erase all data on the “Macintosh HD“ partition.

To do a fresh install of MacOS:

  1. Follow this guide, installing the SSD where the optical drive used to be.
  2. Boot into the MacOS installer by holding the option key.
  3. Go into Disk Utility and erase all data on the “Macintosh HD“ partition.
  4. Install MacOS onto the SSD.
  5. Reboot the computer.

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Joshua crwdns2934231:0crwdne2934231:0
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