目前准备把项目纹理转etc1，写脚本转，去https://developer.arm.com/下载，大概100M，下载网速非常慢而且容易失败
偶然想到creator是不是自带了工具？
然后在引擎安装目录下搜到了这些工具，windows和macOS都有
etcpack
/Applications/CocosCreator2.1.4.app/Contents/Resources/static/tools/texture-compress/mali/OSX_x86/etcpack
pvr
/Applications/CocosCreator2.1.4.app/Contents/Resources/static/tools/texture-compress/PVRTexTool/OSX_x86/PVRTexToolCLI