P: LrC 15.6: Sliders bouncing in the Develop module

Yes, that’s what I have done and it solve the problem. Thank you anyway.

it happens to all sliders, in Develop mode. Once you select it and try to move, it will go to the left, to the extreme negative value and is very annoying if you want to correct small adjustments. On Mac OS 26.3_M1 Max.

Or use an older macOS version like SEQUOA15.7.4, this works also. This is for all who wants to escape from the ADOBE-APPLE deal to buy always the newest operating system. Its a shame!!

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• Verified that my operating system is updated.

Please do the LR menu command Help > System Info, click the Copy button in the upper right corner, and paste into your reply here, so we can see exactly which versions of hardware and software LR thinks you're running and important LR options that are set.

When I try to adjust any slider in the Develop module using the mouse, the slider behaves erratically and immediately jumps or bounces all the way to the minimum (left) value. This makes precise editing nearly impossible.
 

What I have already tried (without success):

• Disabled GPU acceleration in Preferences.
• Reset the Lightroom Classic preferences.
• Verified that my operating system is updated.

Hey dear ADOBE - Team,

it´s again a clear demonstration, that companies work together to sell only new versions of Apps. Its a pitty that only users are the great potential for software testing vs previous system.

As consequence is what you are telling : Sorry dear costumer, we do not have enough staff for testing, its your responsibility to detect whether a newer operation system, like in case of person masking, or an older operating system like in case development sliders is not compatible.  

It would be really far when you openly communicate via web, that LrCC is not anymore compatible with macOS26.x and earlier.

I am frustrated :-((

hey stephanie, very much thxs, but.. i have fear in updating macOS, because off the previous failure with 26.3 or higher, because with this macOS person masking was not possible and you know, macOS earlier version to reinstall is nearly impossible😳

Adjustment via mouse is strange, because putting the mouse arrow with the left mouse bottom constantly pushed on the actual position point 0f a the parameter setting bar puts immediately the position point on the left side.

It's hard to describe. I put a picture beside. 1, does mean the first point of putting the mouse arrow on the setting point, which gives the trigger that the adjustment point jumps. See also the video

That effect is valid for all adjustment bars. I will go back to LrCC 15.4

Any idea?

If Axel’s suggestions don’t help, please do the LR menu command Help > System Info, click the Copy button in the upper right corner, and paste into your reply here, so we can see exactly which versions of hardware and software LR thinks you're running and important LR options that are set.

What has been changed on your system before the error occur?

Do you’re tried to reset the Lightroom preferences?

Is your systm up-to-date? Do you’ve install all recent patches and updates?

Which operating system do you use?

There are several threads with similar issues: