Solved Why Is My Ssd Booting From Usb And Not From Sata Macbook Pro 13 Unibody Late 2011
Chosen Solution I installed OSX 10.10.4 on a Samsung 840 EVO using an external SATA - USB enclosure. When restarted, my MBP booted from the SSD but when I installed the SSD in the HDD SATA bay all I got was a map picture with a question mark in it. The SSD was not recognised. Then I put the HDD in the external enclosure and restarted. The MBP booted from the HDD and in Finder the SSD was present and could be explored....