
If not, check its box and enter your iCloud password when prompted.

In macOS, open the iCloud system preference pane and make sure Find My Mac is checked at the bottom.

You’ll find an option there as well to send the last location of an iPhone or iPad when the device’s battery is nearly dead. The Find My iPhone item will show On or Off next to it, and you can tap it to drill down into settings to enable it when it’s off. You can check whether it’s enabled in iOS by visiting Settings > iCloud. You can opt in iOS to let your phone or tablet send its last position before its battery poops out. But you may have skipped that step, or later turned the feature off to erase and restore a device.

Apple encourages enabling Find My iPhone in iOS and Find My Mac in macOS when you set them up or when performing a major upgrade, like moving from iOS 9 to 10.
