Gatekeeper has recognized that the app was altered after it was signed.

The quarantine system downloaded the app into a sandbox that is corrupted.

The app was signed using a certificate from an unknown authority.

The certificate needed to decrypt this app can't be found in the keychain.

In Network preferences, use the Location pop-up menu to choose a network location.

In Network preferences, click Advanced, click Manage Locations, then select a network location.

Choose a network location from the Network Locations Input menu on the right side of the Finder menu bar.

In Network preferences, choose Manage Locations from the Action pop-up menu below the Interfaces list and select a network location.

To view the startup process details

To present a command-line login

To display hints for the recovery key for a FileVault volume

To display the firmware password

Option-click the Wi-Fi menu item, it will be listed below the network name.

In Network Utility, click the Wireless Performance tab.

In Network preferences, secondary-click the Wi-Fi network service and choose Connection Status.

In Network Diagnostics, click the Interface Status tab and choose Wi-Fi from the interface pop-up menu.

10.0.0.100

169.254.100.100

172.16.100.100

192.168.100.100