Aurora Push in Keychain Certificate export Unable to select the P12 file type

Today in the integration of the Aurora Push SDK, the app ID and development according to this article, after the creation of the release certificate, found that the development and release certificate added to the system keychain after the export cannot select the P12 file, so there is no way to upload the laser push configuration to go, so the app ID, the certificate deleted the reconstruction , or not, but in the period of time you can export the P12 file, but do not remember how to operate, I guess is not the type of choice, the options will change, and later found that when I choose the type for all items, I cannot export the P12 file

The choice of certificate can

Another thing to remind you is that when you export a certificate, do not expand the certificate, or you will generate an error.