IOS development certificate used on multiple machines

Sometimes not on a single machineCodeWhen debugging on a real machine is required, the other machine cannot be debugged because the certificate is not installed. I tried to generate another new certificate using the new certificate application method in the image, but it seems that after a lifetime, the original machine cannot be debugged, recently, it was found that a certificate can be used on multiple machines in an extremely simple way (it is also used in black apple ).

2. Open xcode with certificate machine A-> window-> organizer
4. On the left side of machine a organizerTeamsClickExport, Set the password and storage location.
6. Open xcode on machine B
   
   -> Window-> Organizer
8. On the left side of machine B organizerTeamsDownImport, Select the file to be exported in step 1,Enter Password.
10. Test and close the job.