If all that's changed is the computer, it's most likely the USB section is better in the newer MacBook. I suggest getting an iFi iPurifier 3 too. It's about $150 on Amazon (risk free easy return if you're dissatisfied). It's made my streaming setup really good: lowered noise floor, increased musicality (yes, I know that's a subjective descriptor). In short, I won't part with mine.
Why did this just happen ?
Folks ,
I have been using an old (2012) iMac with a 1TB SS drive for years. It is connected to an old Benchmark USB DAC that feeds my refurbished(2X) Audio Research SP IX mark 2 preamp into my Quicksilver KT88 mono blocks that feed my Pro Ac SE’s.
I just bought a used 2020 MacBook Pro($400.00) to replace the old iMac. I connected it to my USB DAC via a usb C to usb converter.
AND BAM ! The resolution is stunning. I would equate it to a $5K upgrade in any part of my chain. It is truly an ear opener.
What did this ?
The USB C ?, The MacBook isn’t doing anything but output the data to my USB DAC.
I would love to hear from any of you who might know the reason for this wonderful improvement.
Eugene