How do I convert iCloud/Mac contacts (.abbu format)?
To allow Dropcontact to process your iCloud/Mac contacts, simply proceed as follows.
Open a blank sheet of paper under Numbers.
Select all the contacts in the Contact application and drag and drop them on the first cell of the blank Numbers sheet (you have to wait a few moments depending on the number of contacts 😉).
While still in Numbers, go to File, then Export to... (Excel or CSV)
Your file is then ready to be uploaded to Dropcontact ! 🎉