Hi all, I've recently installed a Samsung 850 EVO SSD drive (500gb) on an iMac late 2008 20", following ifixit guide. All steps have been followed carefully, sensor temp cables are OK, etc... After all the hardware part was done, I boot the mac, and I proceed to install a fresh "El Capitan" install, from a 16Gb pen drive (previously prepared with Disk Maker X). Before installing, I delete the SSD partition and make a new one (Mac OS Journaled), with no issues. Even I did a verification, and the disk seems OK. The installation takes a LOT, specially on the last second (i stays like +15minutes on "one second remaining"). After waiting a lot, the installation seems to finish, but after booting seems that the system is not recognized, because it boots again the installation from the pen drive... I've tried booting with "alt" pressed, but the SSD does not appear as a valid boot device, eventhough, when I do the install process, the SSD drive appears as a valid internal drive for installing the system... ¿? Do you have any idea of what's happening? Thanks in advance!!