@saugertiesbob This not correct. The Eversolo doesn't really have a preamp function, it only has digital volume control, you need analog volume control in order to be considered a preamp, and even then it would only be a passive device. You absolutely need to run the Eversolo at 100% with pass through volume control to extract maximum sound quality.
I don't understand why you have clipping, distortion issues in the first place. I've never had an issue with gain using XLR and 100% volume with chip or R2R dacs, this with active pre with dual transformer volume control. That Mac sure must be sensitive to gain to have that issue, not good.