Hi, new member here. Switched to Mac about a year ago, but still struggle with things every now & then. SO, I have searched all over and found this thread, hoping it had my answer, but no...??
On El Capitan, I have an external USB DVD rewriter, which works great. However, after I burn an ISO on a rewritable cd, I can't later erase it. (it's a Kaspersky/Linux rescue boot disk to be used on other PCs) As soon as the ISO disk goes back into the burner, it's not recognized by OS X and so it doesn't show up in Finder, and although it does show up in Disk Utility, all options, except info, are greyed out.
I assume there's got to be a way to erase (non-native?) RW CD using El Capitan, but I can't find it.
Details: OS X ver 10.11.3, Mac Mini late 2012, Samsung SE-208 USB DVD re-writer.
Thanks, Randy