Client -530 error workaround, from Retrospect Inc. Tech Support in Retrospect 9 or higher for Macintosh Posted March 6, 2016 · Report reply As of the day before yesterday, error -530 is back on my MacBook Pro. Tried the workaround yesterday. As of this morning, the workaround didn't work. For my failing scheduled "Sun.-Fri. Backup" script, I just run it again from the Console. My scheduled "Sat. Backup" script simply skips the MBP and goes on to backup the next client, so from the Console I submit a "Sun.-Fri. Backup" script to run after it—which backs up the MBP from scratch because the "Sat. Backup" run has done a Recycle Media Set. Therefore no big deal, just a minute per day of inelegance.