iMac won't Boot : (

[sap12690]

Hey everyone,
Hopefully I can get some help on here about my problem. My iMac has been acting super slow lately and really acting up. Well tonight it froze so I restarted it and now it won't boot back up. It gets stuck on the white screen with black apple logo and progress bar underneath. It freezes for a minute then shuts off completely. I tried running disk utility repair, but it says repair doesn't work. Any ideas?

 

[whodatrr]

Safe boot... hold down shift key, while powering on

try that first

If that doesn't work, try command + R, while rebooting. Then use disk utility to run first aid on the volume.

Try that 2nd.

 

[960design]

If the safe boot does not work:

OS X Recovery
https://support.apple.com/en-us/HT201314