With a brief understanding we are going to make you acquainted with practices such as to Transfer Mac contacts to iPhone using the Vcard file format as we all know that the Vcard in short VCF file format is supported by modern devices like iPhones, iPads, Smartphones etc. thus if required or in case users have the necessitation to carry out the equal, try making use of this third-party utility by the name of OLM Contacts Migrator which if considered as a whole enables to convert Outlook for Mac 2011 contacts to three portable file formats like CSV, PST and VCF respectively. The idea behind to export OLM contacts to CSV, VCF is for the reason that Outlook Mac contacts are not at all portable and therefore cannot be carried anywhere.
Alternatively, files like CSV, VCF are much easier to carry, manage data in a methodical approach moreover the data files will be conserved as it is completely. No alteration of database will take place without the user’s consent as being the key priority. In point of fact some manual operations are there too to transfer/sync Mac contacts to iPhone though they are time consuming and consists of lot of risk which might also end up losing the crucial contacts of yours since we do understand the significance of contacts in one’s life.
Another reason is Sync services can cause duplicates to your data or can even delete your whole data. So our suggestions will be to make an effort and use OLM Contacts Migrator for a safe Transfer Mac contacts to iPhone procedure.
Source - http://www.olmtopsts.com/export-outlook-2011-contacts.html