How to solve Signature issue after system upgraded to iOS15

Question

When my device upgraded to iOS15 beta1, the installed Enterprise App cannot launch success.

ErrorMsg: Signature Version Unsupported, reason: Signature version no longer supported

current code sign version is 20400

Answer 1

I have the same problem,I solve this problem through the following steps:

• go to Targets-General-Frameworks,Libraries,and Embeded Content
• Find the frameworks that are set to embed & sign
• Show in Finder of this Framework
• in Terminal run file xxx.framework ( cd /XXX/XXX/thirdSDK.framework )
• if you see current ar archive ，Indicates that this is a static library。(if you see shared Library ，Indicates that this is a dynamic library.)
• if this framework is current ar archive ,just need to set embed & sign to Don's signing 。Then everything will be ok.

Answer 2

Upgrade macOS version and repackage ipa.