Simplest thing for you will be to get the "audio Optimization Guide" from iTunes iBooks for your Mac OS. Search on iTunes iBooks. This has step-by-step details on how to kill unnecessary applications.
You can swap out the hard drive for a SSD by using instructions from otherworldcomputing.com
Steve N.
Empirical Audio
You can swap out the hard drive for a SSD by using instructions from otherworldcomputing.com
Steve N.
Empirical Audio