Installed Cubase 15 Pro on my 2021 M1 MacBook Pro with macOS 26. Cubase is now very very slow and crashing. It is not workable anymore, only waiting and waiting…. Before the update I did not have any problems with Cubase 14 Pro. Anyone the same issues and possible solution? Thanks!

Hi, Cubase 15.0.6 hotfix is out. This issue has been resolved in this hotfix update.

Hi and welcome to the forum, I’m sorry to hear about your bad experience with Cubase 15. Please, attach the *.ips files, so we can have a look, where does it crash. If you have a description, what did you do before the crash, it’s even better. Mac: macOS Console utility > Crash Reports (or ~user/…

Thanks Martin! I don’t know if I understand you correctly. After the installation I started cubase. After a long waiting time (initializing…) I come in the cubase hub. Then I select ‘ create Empthy project’. After that I press the + sign to add the first instrument track. I select instrument track …

[image] Peter_de_Bont: user/Library/Logs/Diagnostic Reports This is the location you will find the files. With finder, open the user folder, then open library folder, etc until you’re inside the Diagnostic Reports folder. Look for files with ips extension

Halion is definitely doing some strange things that might be causing cubase to not function correctly. I had a similar experience when loading up Halion sonic 7. When added to a track, load and quit times significantly increase. I removed it and used Komplete Kontrol instead and that stopped the iss…

same here! ever since tahoe :frowning: I tried disabling the GPU remedy, still far from ideal as this mode also makes lists not appear until selecting items on them (ie when going through samples, the list is blank until the mouse is run over what appears to be empty). It’s so slow and laggy that …

Same, C15 Pro on Tahoe 26.1 is very slow and laggy on MacBook M1 Pro. I’m right in mixing and need to force a shutdown again. It cannot handle VarAudio for instance. I try to tweak all system and cubase parameters to optimize the set up, but to no real effect. Need to go back to C14. Hope you g…

When I go really low on the monitor settings, things improve. Graphics performance could be one factor to look at.

This is probably the known issue the Steinberg dev team is already busy working on a fix for. There seems to be a problem with “hidden” graphical elements of the Cubase UI. When you have a channel settings window open and it gets covered by the timeline window, the UI starts lagging without any CPU…

This really helps. After closing the plugin windows it works normal. Thanks

I’m running Cubase Pro 15 on Windows 11 and having similar slowness and glitchy-ness with open plugins. Feels like a GUI bug. I’m coming from Cubase Pro 14 (and previously all major versions prior) and this is the first time I’ve seen this. Hoping it gets fixed soon as it’s the only major issue I’m …

Cubase 15 pro is very very slow and crashing

Cubase

uarte December 2, 2025, 2:08pm 14

Could be related to this thread: Cubase 14 & 15 "stuttering" on Mac - #21 by Arne_Scheffler

Note this: