I apologize you were not able to import your contacts from these file types. That is unusual since these are accepted file types, whether using a Mac or PC. Do you recall the error message after selecting those file types? Considering that you are using a Mac, you are also able to import VCard files, if that is helpful. Sometimes an import could fail if there are some special characters or excessive styles on the file itself (styled tables, background colors). See our article for more tips: Import or Upload a File of Contact Email Addresses. If you continue to experience errors, please let us know! We'd love to troubleshoot further.
Liz M. Customer Engagement Specialist
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