Hello,
I have an Apple Developer Enterprise account, and Apple Support has already enabled MDM for my account. I successfully downloaded and installed my MDM Vendor Certificate (it shows up in Keychain as MDM Vendor: [My Company Name] with its private key).
Here’s what I’ve done so far:
Exported the Vendor Certificate + private key as a .p12, then converted to .pem and .key using OpenSSL.
Generated an unsigned CSR with CN=com.apple.mgmt.External. using OpenSSL.
Attempted to sign the CSR using:
my Vendor certificate
the Vendor private key
Apple Worldwide Developer Relations (WWDR) intermediate certificate
OpenSSL smime -sign command with DER output
Problem:
Every time I try to upload the vendor-signed CSR to the Apple Push Certificates Portal, I get an error (CSR rejected).
Sometimes OpenSSL even fails with “unable to load certificates” depending on how the WWDR certificate is included.
My Questions:
What is the correct OpenSSL command and certificate chain Apple expects for signing the CSR?
Do I need to include any additional intermediates besides WWDR?
Is there an official Apple reference example for generating the vendor-signed CSR that the Push Certificates Portal will accept?
Any guidance from the community (or someone who has successfully done this end-to-end) would be greatly appreciated.
Thank you,
Sergio Sanchez
Topic:
Business & Education
SubTopic:
Device Management
Tags:
APNS
Signing Certificates
Apple Business Manager
Family Controls