1. It isn't possible to tell whether or not a retail Snow Leopard DVD will work based only on A1278. Append the last three characters of the computer's serial number to http://www.everymac.com/ultimate-mac-lookup/?search_keywords= and load the page.
1. It isn't possible to tell whether or not a retail Snow Leopard DVD will work based only on A1278. Append the last three characters of the computer's serial number to http://www.everymac.com/ultimate-mac-lookup/?search_keywords= and load the page.
This software supports Mac OS X 10.6 and later. Software Operation Access Open the following link: To download Alpha 1s for Mac programming software. Install After downloading the version from the website, double-click to use it directly without having to install it. MacBook Pro 15in i5 2.3 GHz SSD 128gb A1278 2011-2012 MAC OS High Sierra. $21.90 shipping. Ending Today at 6:42PM PDT 16h 13m. Apple MacBook Pro (13-inch, Mid 2012) - A1278 - For parts or repair only. $14.65 shipping.
2. If you can use that DVD, it'll have all the OS components on one, but not iLife.
3. Insert it, restart the computer with the C or Option key held down, use the Disk Utility to erase the internal drive, and install the OS.
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