This application can easily transfer Android contacts to iPhone directly on Mac.
Backuptrans Android Contacts to iPhone Transfer 3.1 : Main Window

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AnyTrans for Android
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Backup, clone, and transfer data from Android phones to other devices.

iSkysoft Phone Transfer
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It offers an easy-to-use solution to transfer data between portable devices.

Backuptrans Android Contacts
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It helps you backup, restore and manage Android Contacts information on Mac.