To do that, just double-click the Logic Pro application icon, then hold down the respective modifier key(s) until a dialog pops up or Logic is fully loaded.
| Modifier key(s) | Description | Purpose |
| Control | Start without Audio | This can be helpful to rule out problems with a specific Core Audio driver. In some cases, Logic Pro may stop responding or quit unexpectedly while initializing the Core Audio driver. In these cases, start Logic Pro without Audio. If needed, turn on Built-In Audio for the troubleshooting. |
| Shift-Control | AU-Safe Mode | This will only load Audio Units that have passed the Audio Units Validation Tool which is automatically launched on the very first startup of Logic Pro. If you have enabled Audio Units which did not pass this test, you may experience unexpected quitting or misbehavior. With this option, you may revert Logic Pro to a stable state. |
| Command | "Please enter your activation code" Dialog | This brings up the XSKey dialog which allows you to enter an XSKey activation code which was delivered with the upgrade to Logic Pro 7. If you did not enter your activation code when you first started Logic Pro, you can enter it by using Command as a startup modifier key. |
| Shift-Command | "Manual Authorization" Dialog | This brings up the XSKey dialog which allows you to enter an XSKey authorization code and shows the XSKey number. If you have no Internet connection on the computer with Logic Pro, you must get an authorization code manually. An authorization code can be retrieved from here or from an AppleCare representative. |
| Option | Start without Autoload/Template/LastRecent | This will start Logic Pro without loading a Template, Autoload or last opened Song. It is useful for troubleshooting any kind of issue as it excludes the possibility that the reason for a problem is specific to or caused by the currently loaded song. Choosing File > New with the Option Key held down will load a plain empty default song for troubleshooting. |