今天看到了一封来自苹果的邮件，描述的好像是证书要过期的意思，然后看了下钥匙串，发现有两个看起来很类似的发布证书，一个apple开头，一个iOS开头，

Apple Distribution 与 iPhone Distribution，经过仔细研究了下，

Looks like Apple Distribution and Apple Development are only supported on Xcode 11 which means you won't be able to use those certificates in Xcode 10 or below.

Xcode 11 release note:

Xcode 11 supports the new Apple Development and Apple Distribution certificate types. These certificates support building, running, and distributing apps on any Apple platform. Preexisting iOS and macOS development and distribution certificates continue to work, however, new certificates you create in Xcode 11 use the new types. Previous versions of Xcode don’t support these certificates. 

大概的意思是apple开头的证书是在x-code11以后出现的，也是苹果推荐的，相当于引导 开发者不只是iphone上， 其他苹果设备的也能让你打包发布 ；

所以xode11以后二者作用都一样，11之前的话apple开头的证书会报错，低版本的不支持apple dis