Once you notice the problem, then notify the changes immediately to the professional. He will make an estimate and check your computer; he will suggest you the appropriate remedies. It can be a change of hardware, a simple up-gradation, installation or uninstallation of programs and software. You may be required to physically give access to the cloud of your computer if there is a need for installation or uninstallation of any service on the device.
If you need help creating an Apple eco-space of all your Apple devices, then the expert can also help you set it up.