I've just received Apple notice that some certificates will expire in one month.
Your iOS Development Certificate will no longer be valid in 30 days. To generate a new certificate, sign in and visit Certificates, Identifiers & Profiles.
So, I went to Certificate, Identifeir and profile link.
I effectively see there that I have development certificates to expire soon on 2 machines.
I have downloaded (but not revoked) for a first machine.
But I'm not sure on what I need to do now to safely install this download in XCode ?
And can I do the update for the other machine from here ?
After downloading the fresh cert, locate it in the Finder and double click to install (to keychain).
Open Keychain Access to confirm and housekeep, feeling free to delete duplicates & any that have expired.
I assume the same process would apply on each of the two machines.
Use Xcode/Preferences/Accounts/<accountName>/Manage Certificates to confirm the new certs are in play (assumes auto code signing at the project level, I believe).