I'm back some twenty years after my last Mac. I've got a brand new iMac running Yosemite and I do need to access an external HD formatted on (Gnu/Linux) ext4 (a journaling file system). I downloaded a library (FUSE for OSX), which is able to read that file system and a complementary app (ext4fuse), which works as a client interface to FUSE. I can mount the disk and navigate it on the finder or on a terminal but, when it comes to actually copying files (either on a terminal [see * below, pls] or on the finder), I get an error such as "Cannot read the file" or even "File does not exist". I suspect that it has something to do with permissions, so I thought that doing the copying as root might help.
I'd appreciate any help. Thanks in advance!
P.S. I've tried any number of searches to no avail. [*] Trying to do the job from the terminal issuing a cp command didn't get my any closer to achieve it. Apparently, btw, the cp command in OSX is kinda restricted (regarding to its available options and functionality) wrt its Linux counterpart and, to add the insult to the injury, its options don't work the same (see -R, for instance).