How can I make a disk that I can put into my MBP and have it boot to my normal system? Last weekend I let the OS install about 7 updates. After installing them the computer would only boot to a gray screen with a "NO" symbol and the spinning image. I was trying to get to the airport so I grabbed what I thought was my install disk, but was really the app install disc and headed for the airport. Pressing C and booting to the app disc let the system start like normal. When I verified the disk permissions it found a problem with an ACL on launchd. Doing a repair fixed it. The next bootup was normal. But every time I booted after that I verified the disk and had to repair it again. BTW I don't know if the ACL on launchd is the root cause of the boot problems. At least I was able to boot up normal with this routine. Yesterday I booted up about 6 times with doing repairs and worked normally. So now I don't trust the OS to boot normal all the time, especially if I'm on a trip and won't be home for 5 days (happens every week) and don't have a boot disk of some type. Any help appreciated and yes I've researched this topic everywhere.