geirha 1515142891 learn Since version 4.0, bash is licensed with GPLv3 which is incompatible with Mac App Store. This is why MacOS is stuck with bash 3.2. https://en.wikipedia.org/wiki/GNU_General_Public_License#Legal_barrier_to_app_stores geirha 1532601383 forget geirha 1532601400 learn Since version 4.0, bash is licensed with GPLv3 which is incompatible with Mac App Store. This is why MacOS is stuck with bash 3.2 (GPLv2). https://en.wikipedia.org/wiki/GNU_General_Public_License#Legal_barrier_to_app_stores