我从https://github.com/mozilla/DeepSpeech/releases开始尝试安装.whl文件，但收到错误消息“该平台上不支持车轮”：
pip3 install deepspeech-0.5.0a5-cp27-cp27m-macosx_10_10_x86_64.whl
deepspeech-0.5.0a5-cp27-cp27m-macosx_10_10_x86_64.whl is not a supported wheel on this platform.
You are using pip version 9.0.3, however version 19.0.3 is available.
如何确定应该安装的.whl正确版本？ https://github.com/mozilla/DeepSpeech/releases有许多可用的版本，如何为我的Mac确定正确的版本？