Very slow boot up on OS X Yosemite

[iHAMED]

Hello

when i pressing power button on my macbook pro, my macbook is turning on but stay on black screen about 30 seconds then apple logo and user/pass and then yosemite running without any problem.

i haven't this problem and my macbook was booted about 15 seconds.
what is this problem and how can i Resolve it?

i using from clean my mac for uninstall my application and clean my mac scan my system automatically.
i think clean my mac removed or damaged to part of system.

because after scan ituneshelper removed from login items and i restore it from itunes contents>macos.

Please help me, thank you.

 

[drlunanerd]

Simple thing to check is your Startup Disk setting: go to System Preferences - Startup Disk and select the system you want to boot up from. If there's nothing selected it will increase the boot time.

 

[iHAMED]

Simple thing to check is your Startup Disk setting: go to System Preferences - Startup Disk and select the system you want to boot up from. If there's nothing selected it will increase the boot time.

Thank you drlunanerd.
in the startup disk this item was not selected.
i selected it and restart Mac.
this problem has solved.

 

[drlunanerd]

Great, happy to hear it wasn't anything more serious

 

[iHAMED]

Great, happy to hear it wasn't anything more serious

Thanl you

 

[MacGizmo]

drlunanerd: And all this time I've been kicking the screen and throwing the keyboard on the floor...

 

[siroht]

I was having the same problem....searched high and low with no success. Bam!! Saw this thread and solved my problem. I was just about to pull the trigger for a new SSD.

Thanks!!$$!!