Just installed a 4TB Seagate SSHD and it's "not readable." Any help?Hi, I just upgraded an internal drive on my 4,1 (early 2009, 8 core 2.66) Mac Pro running Yosemite 10.10.5. It's a drive I us...
Answer to: Just installed a 4TB Seagate SSHD and it's "not readable." Any help?Thanks guys! I ended up doing some more research and found that there are apparently some issues with drives above 2TB with newer versions of the OS. I found advice ranging from shortening mounting screw lengths to booting from Snow Leopard and formatting. In the end, I just tried formatting it (still in 10.10.5), which seems to have worked. I had to re-copy the data, but now I seem to have a fully functioning 4TB drive.