Choppy performance in Nuendo 14.0.40 on MacOS Tahoe 26.1

Nuendo
1

Has anyone tested the newest Nuendo release on MacOS Tahoe 26.1 yet?

I am getting extremely slow framerates and weird hiccups inside Nuendo 14.0.40 - no audio glitches, just massively slow and sluggish UI.

Activity Monitor is showing no significant CPU/GPU utilization at all.

update
Found the problem: ASIO Guard and Arturia Coldfire Distortion plugin. Deactivating either plugin or ASIO Guard fixes the issue…temporarily :man_shrugging:

update

No, this does not seem to have anything to do with either ASIO Guard or Arturia plugins. Upon testing further, I noticed that adding more than two inserts into the effect bus of an instrument or wave channel, the problems start happening immediately. I can’t reproduce this on my M4 Max, only on M1 Ultra All M-Series Macs affected.

1 Like
2

Been investigating this further. It also happens with just one stock effect loaded. (See video).

To reproduce:

  1. Mac Studio M1 Ultra
  2. New Project
  3. New Track
  4. Open Track Channel Settings
  5. Add an insert into first effect slot

What should happen:
Timeline cursor progressing fluidly, UI responding quick and normally

What instead happens:
Timeline cursor jumps, UI does not respond immediately, popups open slowly, slow framerates

update

problem also happens with Cubase 13, Nuendo 13

update

Confirmed for M4 as well.

The problem occurs as soon as you have a channel window open and then click into the timeline window, causing the “channel settings” window to get hidden while it’s still open behind the main window. As soon as you switch back to channel settings, the stutter disappears.

3

Temporary fix: Preferences > User Interface > Disable GPU Acceleration

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