New 1TB SSHD drive not initializing. Option is greyed out in Disk Util
I just replaced an SSD drive with a 1TB SSD Drive on my mid 2012 Mac Book Pro.
The older SSD drive was my boot drive for over a year but it ran out of space.
With the new drive installed I booted from my original HD drive with Sierra installed with the hope of downloading the OS.
Instead I get a message that an internal drive can not be read by this computer. I'm asked if I would like to initialize the new drive. I click yes. Disk Utility opens and the new drive is listed but it can't be mounted. That option is grayed out. Any Ideas?
Thanks very much,
Is this a good question?