Codesigning error on Xcode 16

[BDJoe]

Updated to Xcode 16 now getting a code signing error when trying to create isa. I compile iOS app signer based off the new changes to the provisioning profile location but still getting this error.

I am also experiencing this on Apple M2 Pro 15.1 Beta (24B5055e)

Updated to Xcode 16 now getting a code signing error when trying to create isa. I compile iOS app signer based off the new changes to the provisioning profile location but still getting this error.

OP, I resolved this issue by deleting a duplicate Apple Development Certificate. Here’s what worked for me:

1. Open Keychain Access.app.
2. In the left sidebar under Default Keychains, select Login.
3. At the top, click on My Certificates.
4. Look for duplicate Apple Development Certificates.

• Delete the one with the earliest expiration date.

Note: I’m not entirely sure about any consequences of deleting this duplicate, so proceed with caution.

Additionally:

• I made sure to install the latest G3 intermediate certificates from Apple’s developer site, which you can find here: WWDR Intermediate Certificates.
• Check for any expiring certificates in keychain access and update as necessary.

[BDJoe]

Updated to Xcode 16 now getting a code signing error when trying to create isa. I compile iOS app signer based off the new changes to the provisioning profile location but still getting this error.

OP, I resolved this issue by deleting a duplicate Apple Development Certificate. Here’s what worked for me:

1. Open Keychain Access.app.
2. In the left sidebar under Default Keychains, select Login.
3. At the top, click on My Certificates.
4. Look for duplicate Apple Development Certificates.

• Delete the one with the earliest expiration date.

Note: I’m not entirely sure about any consequences of deleting this duplicate, so proceed with caution.

Additionally:

• I made sure to install the latest G3 intermediate certificates from Apple’s developer site, which you can find here: WWDR Intermediate Certificates.
• Check for any expiring certificates in keychain access and update as necessary.

I didn't have any duplicates but adding the G3 certificate seemed to fix the issue thanks.