Macworld Apple has released new iOS 18 firmware for the AirPods Pro 2 (both Lightning and USB-C)and AirPods 4 (with and without ANC). It is not clear yet what this firmware does; it could be simply bug fixes, or it could be necessary code to enable the new hearing features coming soon with iOS 18. The firmware version for the AirPods Pro 2 is 7A302 and AirPods 4 get firmware version 7A304, up from 7A294. Apple has not yet issued release notes for this update, but when it does it can be found here. There isn’t a way to force an upgrade to the new firmware; it will automatically install when the…