How to get a Certificate Signing Request (CSR) File?
Follow the steps below to get the CSR file:
Step 1: Launch Keychain Access located in /Applications/Utilities.
Step 2: Choose Keychain Access > Certificate Assistant > Request a Certificate from a Certificate Authority.
Step 3: In the Certificate Assistant dialog, enter an email address in the User Email Address field.
Step 4: In the Common Name field, enter a name for the key.
Step 5: Leave the CA Email Address field empty.
Step 6: Choose “Saved to disk,” then click Continue.
Step 7: In the dialog box that appears, give the CSR a filename with the extension .certSigningRequest, choose a location to save it, and click the Save button.
Step 8: Your new CSR will be saved to disk in your specified location.