A technical note posted to Apple’s Web site notes that some MacBook laptops may run too warm because of an issue involved in their manufacture. The good news is that it’s something that users can easily fix themselves.
Apple reports that some MacBooks appear to run too warm, with their internal fans running consistently and heat emanating from top and bottom. If this happens, you’re encouraged to check the MacBook’s rear vent for the presence of a thin piece of clear plastic.
“This is used in the factory to prevent dust from getting into your computer,” reads the tech note. “If your MacBook has the plastic still over the vent, simply remove and discard it.”
Apple also encourages MacBook owners who remain concerned about the operating temperature of their systems to read an associated technical note entitled Apple Notebooks: Operating Temperature.