unable to launch apple diagnostics
I have been noticing that my macbook is taking much longer to boot up and is often time very sluggish. I was going to try and run the apple diagnostics for my Macbook Pro Mid-2010 but I am unable to launch it. I have tried from a power down holding the D key and also tried it from a restart prompt.
What am I doing wrong?
MacBook Pro, OS X Yosemite (10.10.3)