1.查看是否 the filesystem being mounted as noexec
2.The script was being run from inside a .dmg that had the quarantine flag set on it. When the .dmg was mounted, it was mounting it with a quarantine flag that is inherited, but doesn‘t show up. I unmounted the .dmg, removed the quarantine flag, and re-mounted it, and all was well.
一下是网络搜索结果的引用：
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原文：http://jingkonglanxing.blog.51cto.com/1152128/1743755