I’m having problems with my mac
My Mac has a padlock on screen
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Hello 🤗
If your Mac is using a firmware password, the lock icon appears when you try to start up from another disk or volume, such as an external drive or macOS Recovery. Enter the firmware password to continue.
Source : If your Mac doesn't start up all the way - Apple Support (CA)
if this is not the padlock on your screen or you have oders problems or questions, come back to us or contact Apple Support