I have a 27" mid 2011 2.7 ghz i5 4gb ram running M/L.
I have noticed a different noise on startup from sleep,i hear the hard drive start then about 5 sec after with the desktop has loaded there is a swishing sound that last for about 1 sec,there is no disc in the drive,i have found that if i put it to sleep it starts better than if the screen saver comes on then goes to sleep,it does take about 5 secs to load up if the screen saver comes on before sleep.
This is a refurb from the apple store 4 months ago.Also checked for hard drive replacement and it does not require one.this noise has only started in the last few days,i had a 21' i3 for years and it never did this,i don't like unfamiliar noises in any thing.
I have noticed a different noise on startup from sleep,i hear the hard drive start then about 5 sec after with the desktop has loaded there is a swishing sound that last for about 1 sec,there is no disc in the drive,i have found that if i put it to sleep it starts better than if the screen saver comes on then goes to sleep,it does take about 5 secs to load up if the screen saver comes on before sleep.
This is a refurb from the apple store 4 months ago.Also checked for hard drive replacement and it does not require one.this noise has only started in the last few days,i had a 21' i3 for years and it never did this,i don't like unfamiliar noises in any thing.