A grey progress bar will appear and will load for a little bit and will shut off, what do I do?

Running the Snow Leopard disk did not work for me, I do not advise spending money on this. My computer turned on to the grey progress bar screen as usual, I heard the disk boot up and start spinning, then after a while stop running, and then the computer shut down as usual. Same result with repeated attempts.

I ran an update and now my imac won't start up!!! I'm furious 😠

You might want to consider starting a new discussion. Since this one is a couple of years old, less people are likely to look at it. A new post would be much more visible. You can link to this one.

Startup Issues - Resolve

Startup Issues - Resolve (2)

Startup Issues - Resolve (3)

How can I get to system preferences if my computer powers off during startup??

Thank yoy very much, this solved my problem. I had to login just to say thanks! God bless you! :)

I am currently having the same issue with my MacBook Pro 2012.

I have entered the text exactly how you describe To and I keep getting a message saying:

"No such file or directory"

Any suggestions!