The Federal Aviation Authority has reiterated that recalled MacBook Pros that haven't had their faulty batteries switched are not welcome in carry-on or luggage stowed aboard flights.
MacBook Pros made between 2015 and 2017 - about 432,000 machines in the US and Canada - need to be returned to base to have their batteries replaced. The process can take up to two weeks.
The FAA told NPR that it had warned airlines and the public in early July following Apple's recall notice in late June.
Apple warned users to stop using the laptops immediately due the danger of batteries overheating.
The same models have already been through one recall due to dodgy butterfly keyboards.
Four international airlines with ops run by Total Cargo Expertise have banned the laptops from being transported. According to internal documents seen by Bloomberg they are Tui Group Airlines, Thomas Cook Airlines, Air Italy and Canada's Air Transat. ®