Jon and Artie After 2 days no start-up problem, knock on wood! I did not do the disk repair, but not because I do not appreciate your advice. After years of tinkering with old machines, a 1952 MG and 2 cycle SAABs, for example, I follow the old habit of trying one cure at a time. Then if the problem is solved, you are pretty sure you know why. If the "Safe Boot" was the cure, great! I will try the next step, Disk Rep., if the problem starts again. Dave
I can't fault your logic; attempting simultaneous cures at best leaves you up and running,
but with no idea why.
Edit: Give your Mac a while, and once you're satisfied it's running OK you might consider running "Repair Disk" (It's a benign function, by the way.) as additional "juju," because while you'll know what fixed your Mac you won't know what made it need fixing.
