i am stuck on disc os installation loop. let me explain. i wanna do a fresh install of os x tiger on a mid-2007 imac using the disc that came with the computer. disk utility says disk is repaired and it is verified. then i proceed to install os. a couple times got error during installation forcing me to retart. but i have gotten through the end of installation three times after that already where the computer restarts when it is complete. the problem is that when the computer restarts (long grey screen then computer goes to apple logo with process wheel)--when the computer restarts after a bit--the computer goes back to the installation process on the disc, asking me to install it all over again. when i look under disk utility, the installation looks as if it wrote files physically on the drive. but no operating system. i have done this 3 times as mentioned but i don't wanna keep doing it if the results are the same. does any one know the problem? when i eject the dvd install disc, i just get a flashing folder with a question mark.* *flashing question mark folder looks odd for my mid-2007 imac because it came with tiger and the icon reminds me more from a newer os or ios graphic like lion which is what the imac ran on before it encountered grey screen and forcing me to do fresh install which is not working three or four times as i've explained above.