These laptops include... MacBook 13 inch, mid 2009. All MacBooks and MacBook Pros, early 2009 and before.
Shut down. Remove the battery. Press and hold the power button for 5 seconds. Release the power button. Reinstall the battery. Turn on the Mac normally.
I usually write a blog post about once a week. The latest post can be viewed here: Are We the Baddies?: Maybe you should ask yourself: are we the baddies? (posted 2025-11-24 at 17:01:10). I do podcasts too!. You can listen to my latest podcast, here: OJB's Podcast 2025-11-06 Democracy v Bureaucracy: It's not left versus right which I am complaining about: it is bureaucracy versus democracy!.