MacX DVD Ripper Pro very slow when my iMac screen is in sleep mode

Hello everyone,

So here’s what I found. Somehow, when my iMac’s screen is asleep (only the screen, not the CPU and not the HD of course), I fond the Ripping process of MacX DVD Riper VERY slow. As soon as I wke-up the screen, it goes fast again.

Did anyone else notice ? Any chance someone found a fix ?

Thanks and best regards,