![Used a very weak fridge magnet and some masking tape to force my MacBook Pro into clamshell mode without closing it, so I can use an external monitor, without sacrificing the thermals. Used a very weak fridge magnet and some masking tape to force my MacBook Pro into clamshell mode without closing it, so I can use an external monitor, without sacrificing the thermals.](https://preview.redd.it/gzm50am9gjy41.jpg?width=640&crop=smart&auto=webp&s=00a2e158f89dc4520f90e809621cbfd6d1290ba4)
Used a very weak fridge magnet and some masking tape to force my MacBook Pro into clamshell mode without closing it, so I can use an external monitor, without sacrificing the thermals.
![Twelve South Launches BookArc Inserts for 16-Inch MacBook Pro and New MacBook Air | MacRumors Forums Twelve South Launches BookArc Inserts for 16-Inch MacBook Pro and New MacBook Air | MacRumors Forums](https://images.macrumors.com/article-new/2020/06/twelve-south-bookarc.jpg)
Twelve South Launches BookArc Inserts for 16-Inch MacBook Pro and New MacBook Air | MacRumors Forums
Benjamin Mayo on X: "New M3 MacBook Air supports two external displays ... but only when the laptop lid is closed in clamshell mode https://t.co/vnva6zRZXk" / X
![Macbook Air M3 loses 50% performance in 'clamshell' mode - but there is one expensive solution - PC Guide Macbook Air M3 loses 50% performance in 'clamshell' mode - but there is one expensive solution - PC Guide](https://www.pcguide.com/wp-content/uploads/2024/03/MacBook-Air-M3-clamshell-mode.jpg)
Macbook Air M3 loses 50% performance in 'clamshell' mode - but there is one expensive solution - PC Guide
![Don't use your M3 MacBook Air with the lid closed — tests reveal 50% speed reduction in clamshell mode as the temperature increases | iMore Don't use your M3 MacBook Air with the lid closed — tests reveal 50% speed reduction in clamshell mode as the temperature increases | iMore](https://cdn.mos.cms.futurecdn.net/eX7uFeecSsNLwLQBFzRVba.jpg)