How can I write a DCP drive on OS X?

Mac-formatted drives are very unlikely to work when plugged into cinema servers, so you should probably not use them to transfer DCPs. Better options are:

• Use the DCP-o-matic Disk Writer. This is a seperate DCP-o-matic tool that you can download for free and that will write drives in the correct format.
• Use DCP Transfer — it's not free, but it works well.
• Write to ext2 format (Linux) using Fuse for OS X and Fuse-Ext2.
• Write to NTFS (Windows) using Paragon NTFS or Tuxera NTFS. This is not 100% guaranteed to work, but most servers accept NTFS drives.
• Create a virtual machine with Virtualbox and install a Linux distribution like Ubuntu on it, then use that to copy your DCP onto a ext2-format drive.
• Boot a Linux distribution (e.g. Ubuntu) in ‘live’ mode and do your copying from there.

Unfortunately I would not recommend Paragon ExtFS for Mac. We have had a number of reports about this software writing corrupted files.