Chosen Solution
Welcome! There is a computer iMac 21,5 2010. The problem is that! I started very slow! When downloading, installing OS, during operation. When testing the service program, revealed the following errors. (See the attached file) In the first test on the bluetooth bug - but the mouse and keyboard are working properly. In the second - such as HDD. What can it be that out of order? Let’s just say, a stable but very very slow!
Boot from an external drive and run Disk Utilities on your internal HD. Check to see how full your drive is.
