I bought a SSD drive for my early MacbookPro 2011, since my old HDD was very slow and with crazy IO activity when idle. I started the Internet Recovery Mode and opened the Disk Utility to format the SSD as Mac OS Extended (Journaled) so that I could install MacOSX. However the formatting process is stuck at around 50% and the estimated time just goes up. It is on a step where the drive name and information is gone: completely disappeared from Disk Utility. The step is now called Partitioning. I don't know if I should interrupt the process by closing the utility. It warns me that the drive may be unusable if I do so. What should I do? It has been already more than 1 hour.