How to transfer developer profile to one mac to another mac

Export developer profile from old mac.
In the Xcode Organizer, select your team in the Teams section.
Click Export.
Specify a filename and a password, and click Save.
In new mac, 
In the Xcode Organizer, select Library->Provisioning Profiles.
Click Refresh at right-bottom corner.
Provisioning Profiles will be downloaded from Apple Developer Center.
In new mac,
In the Xcode Organizer, select your team in the Teams section.
Click Import.
Select the developer profile exported from old mac.
Enter the password for the file, and click Open.
Now you can develop app in your new mac with the developer profile and don't need create a new developer profile.

补充：移动开发 , IOS ,