Is there a known RX audio issue with 6600m on Mac OS Catalina?

thank you for answer Mike, my call is sv3eao. No, its not the filters, I double checked, I setup RX filters to 0-3000hz even 0-6000Hz listening some essb ham radio stations. I tried the 6600M by itself without SmartSDR and it sounds really excellent to my high quality headphones. The problem seems to be the cooperation of the transceiver with the iMac. Even with large cache I have enough RX latency, some glitches when I use my browser and not the best quality audio from my speakers. I tried and iMac's internal sound card without any improvement. Its little better when I connect the RJ45 directly to my iMac's ethernet socket. The sound quality isn't bad at all but its not as good as my sdrplay or my icom 7851. It sounded like a bit compressed and thin. I also have some audio glitches when I use some daily use apps like my safari browser of the Microsoft excel files. My 27" iMac is very strong with 24GB ram, I7 etc. I don't know if this is normal because the cooperation of my 6600M is via Ethernet. I never used a transceiver before with ethernet cooperation. I do not want to hide that I am a little disappointed... For sure the transceiver its ok with excellent audio. If something is wrong is from ethernet transfer, or software audio code/decode. Tomorrow I will try it to my MacBook Pro 16".

Thank you for answer Paul. Yes you are right. Smartsdr version is 1.4.23 and transceiver's firmware is 3.1.12. EQ is out and flat. RX & TX. Today i tried ACC line out directly to my soundcard interface input and the sound is CD quality. Maybe its not a problem at all, just a little bit tiny and compressed audio via SmartSDR. through my network. Now i have to solve only some sound glitches and pops, especially when i use safari or Chrome browser. Its not so stable for me.