Garageband wasn’t this bad before the last upgrade
To Mavericks? Any way to Time Machine your way back to a better time? Mavericks caused a number of unfortunate problems. Do you have 10.9.4? That was the latest upgrade where they fixed some of the more serious earlier problems. The first Mavericks tried to save battery life by shutting down and starting up rapidly. It turned some sound productions into garbage.
My last two MBPs had Solid State Drives (SSD) instead of spinning metal hard drives. No noise or vibration, insanely fast, immune to mechanical shocks and very little heat. If you feel the bottom of your MBP, about half or more of that running heat is coming from the drive.
They’re expensive in large sizes. The last two were 250GB and the one before that was a 112MB. That’s funny when you consider people putting 1TB spinning drives in their laptops, but I put most shows on external drives, and the SSD characteristics are very desirable.
I’m out of ideas. I’ve never heard anybody else complaining about this and none of my current machines do it.
How big is your drive and how full is it? If you have it appearing on your desktop, Control-Click > Get INFO. If not, Go > Computer > Control-Click your hard drive > Get INFO. Drives have to work very hard when they fill up.
Have you done first level maintenance?
Close all your applications.
Go > Utilities > Disk Utilities: select your hard drive and Verify Disk and then Repair Permissions.
In the odd event that you don’t leave your machine running at 4AM, you might need to do some of the automatic 4AM tasks manually.
Go > Utilities > Terminal
Last login: Sat Aug 9 22:37:35 on console
johnny:~ koz$ sudo periodic daily weekly monthly
You type the blue parts and then press Enter. It will ask you for your password. This is a Systems Level tool.
Obviously, your login information will be a little different from mine.
That may take a while if you’ve never done it. I think it’s the weekly one that piles up. It just vanishes. That’s normal. Wait.
Have you Googled your problem? “Noisy Fan 17” MBP"