If you'd prefer being harder to track over having Time Machine, push notifications, and several sync services work, then you can disable most of them; if you'd

If you'd prefer being harder to track over having Time Machine, push notifications, and several sync services work, then you can disable most of them; if you'd prefer services to work and usability of your applications, none of them. If you're not sure of the nuances (or the pros/cons of using a "secure" Mac OSX install vs a secure Linux distro), you should research each of the services you're disabling to at least appreciate the attack surface each surface adds to your machine.