Select the device you want to erase and click Erase (device).Click the name of the current device in the center of the toolbar to access the Devices list, then select a new device.) (Note: If you don't see All Devices, you've already selected a device. Click Find My iPhone, then All Devices.
Here’s how to wipe all the data stored on it remotely: Now, let’s say your iPhone, iPad or Mac goes missing. Check that Find My Mac is on and Find My network is On. To make sure you can find your Mac if it’s ever lost or stolen, click Options.Click Done, then return to the main System Preferences window.Make sure that the checkbox next to Find My is selected.