Keep your MacBook Air out of high humidity.

Bad idea. Long-term exposure to high humidity is not kind to any laptop, and the MacBook Air is no exception.

The usual trouble is corrosion. The internal connectors, the charging port, even the logic board traces can slowly degrade when moisture in the air stays above 80% for weeks or months. You might not notice at first, but one day the keyboard gets flaky, the trackpad stops clicking, or the machine just won’t charge.

Condensation is the other killer. A MacBook brought from a humid room into air conditioning can get internal moisture that shorts something. Happens more often in tropical climates or bathrooms (please don’t work in the shower).

Apple doesn’t publish a specific “don’t exceed this humidity” number for long-term use, but general electronics best practice is to avoid sustained RH above 80%. If you live somewhere that’s humid for half the year, keep the MacBook in an air-conditioned room when not in use, and consider a silica gel pack in your laptop bag.

You don’t need to panic, but don’t let it sit in a steamy room for months either.