One of the most potentially useful features of the new M3 MacBook Air is support for two external displays when the lid of the laptop is closed (in 'clamshell mode'), which is great news for those of us who prefer larger screens or multitasking – or at least, it should be.
We say that because some tech gurus have been running stress tests on the new machine, and the results suggest that you could see a drop in performance of as much as 50% in clamshell mode – making the dual-monitor setup far less appealing.
