No, changing the format of a drive (NTFS, FAT32, ext4 etc) will erase the drive.
As default OSX cannot read NTFS drives, but from a quick search there are ways to allow it to be done. See for example the link below:
http://www.cnet.com/uk/news/how-to-manually-enable-ntfs-read-and-write-in-os-x/
I don’t own a Mac so I can’t test it, but it may be helpful to you. The above link was just the first one that came up - do your own search for reading NTFS drives on a Mac and you can find other variants or pieces of software that may help.
