There is an excellent diagnostic tool available, Etrecheck. It just looks at your system and provides a detailed review of what you're running, how it's running, etc. Here's an excerpt from one for the developer's posts here in the forums:
"EtreCheck is designed to print out basic information about your machine in order to help the people who are trying to help you figure out why it is running slowly. It will report your machine model, amount of RAM, hard disk type and size, and any 3rd party software that runs in the background. It actually does much more than that, but those are the key features. EtreCheck will also alert you to significant problems that you might not have realized, like a failing hard drive, lack of RAM, lack of Time Machine backup, or an adware infection. The most recent version of EtreCheck will even help you remove the adware. EtreCheck doesn't automatically delete anything, but it will delete adware if you ask it to. It will also show you more details about things that could potentially be adware or malware."
It transmit no personal information. It's probably the top tool many of us use here to help diagnose problems with user's machines in order to find a solution.