Find my iPhone

Hi there Pariscarlisle03,

It sounds like you need to unlock your Mac in Find My. If that is correct, please check out the information below which should help you:

"Turn off Lost Mode on a device

When you find your lost iPhone, iPad, iPod touch, Apple Watch, or supported iPhone Wallet with MagSafe, turn off Lost Mode.

1. In the Find My app  on your Mac, click Devices.
2. In the Devices list, select the device you marked as lost, then click the Info button on the map.
3. Under Mark As Lost, click Pending or Activated.
4. Click Turn Off Mark As Lost, then click Turn Off to confirm.

You can also turn off Lost Mode on iCloud.com or from your iPhone, iPad, iPod touch, or Apple Watch by entering the device’s passcode (the one you use to unlock your device). For a supported iPhone Wallet with MagSafe, you can turn off Lost Mode by attaching the wallet to your iPhone.

If you forget your device passcode, you can recover it using Find Devices on iCloud.com. See Use Lost Mode in Find Devices in the iCloud User Guide.

Unlock a Mac

When you find your lost Mac, enter the numeric passcode on the device to unlock it (the one you set up when you marked your Mac as lost).

Note: You can’t turn off Mark As Lost remotely from another Mac. You can only turn it off directly on the Mac that you marked as lost.

If you forget your device passcode, you can recover it using Find Devices on iCloud.com. See Use Lost Mode in Find Devices in the iCloud User Guide."

That information is from this article: Mark a device as lost in Find My on Mac - Apple Support

If you have any issues unlocking your Mac, then this article has steps that should help you further: If your Mac is lost or stolen - Apple Support

We hope that helps.

Take care.