How to export code signing certificate for iOS apps?

Step 1: To export your private key and certificate and for enabling development on multiple systems, open up the Keychain Access Application and select the ‘Certificates’ category from left Menu.

Step 2: Expand the certificate and Control-Click on the certificate and private key associated with your iOS Development/Distribution Certificate and click ‘Export Items’ in the menu.

Step 3: Save your certificate in the Personal Information Exchange (.p12) file format.

Step 4: You will be prompted to create a password (This is used when you attempt to import this certificate and key on another computer). Now share this certificate and password with your team.