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Macbook Pro 13’’ 2011 - MaC OS Sierra Guys, Hello. I have a Macbook Pro 13’’ early 2011, Core I5, 8GB and SSD 128 GB as main drive and running latest version of Mac OS Sierra, however I can’t setup the second SSD drive replacing the DVD just because the format system applied when I place the drive inside isn’t compatible to the OS Sierra. The main SSD runs perfectly, but the additional drive I can only run via external USB and under ExFat format. When I install it to the caddie and turn on the Mac isn’t recogninzing as second device and no matter what I do to format in all available formats I simply can’t make it. Besides this issue there’s another which regards to the file size when the drive is at ExFat format since I also can’t copy bigger files when needed. Any clue about this issue? Many thanks in advance for the support. Rgds Marco
It’s not going to run internally if formatted other than GUID. Boot up holding down the Option key and select the repair partition. Go to Disk Utilities and see if you can format it that way. That failing, please tell us the make and model number of the secondary drive. Also, please tell us if you were having beach ball issues with the original internal drive and why you replaced it if other than just wanting a speed bump. Did you replace the hard drive/IR cable?
