Sounds like you have a similar problem as I do. Are you outputting to a USB DAC? When you have a chance, can you see if you can reproduce my issue?
Steps:
1) Open the Audio MIDI Setup app.
2) Select the USB DAC output you use to listen to Tidal
3) Make sure the Primary Stream volume is set to maximum Value=1.0 db=0.0
4) Open the Tidal app.
5) Play a song on Tidal
6) Make sure your Tidal volume slider is set to Max.
7)Enter the sound output menu (little speaker icon next to the volume control in the Tidal app)
8) Choose the USB DAC (more settings)
9) You should get a pop up with two options: 1) Exclusive mode 2) Force Volume.
10) Toggle on Use Exclusive Mode.
Q1: Does the volume suddenly drop?
Q2: Go back to the Audio MIDI Setup app. What is the Primary Stream volume level for your USB DAC now at?