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P: LrC 15.6: Sliders bouncing in the Develop module

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Lightroom was working perfectly this morning.. I come to load in new images and edit some while sitting here.. and as soon as Lightroom opened up - I tried to slide exposure (and other ones to test those...) and the slider immediately jumps one way or another.

I have reset preferences, turned off GPU.. NOTHING is helping.. please help me!

Pinned Reply By Sameer K

Hi All! Note from the team:

“On macOS Tahoe 26.3 or earlier, if the Develop module sliders move erratically after upgrading to Lightroom Classic 15.6, update to the latest Tahoe version (26.7, or later).”

Thanks!
Sameer K

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mr.anderson

Participant

I got the same bug, whenever I wanna click on the adjustment bar it sends me off to the far side of it making it extremely to work with.

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MIFKAP

Inspiring

Does adobe provide system requirements with its upgrades? I don’t recall seeing them with the latest release of Lightroom Classic

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johnrellis

Legend

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@MIFKAP Does adobe provide system requirements with its upgrades?

See this page for Lightroom Classic system requirements, by version:

https://helpx.adobe.com/lightroom-classic/desktop/introduction-to-lightroom-classic/system-requirements.html

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MIFKAP

Inspiring

Thanks

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johnrellis

Legend

Moderators, @Sameer K, please merge with this bug report:

https://community.adobe.com/bug-reports-674/p-lrc-15-6-sliders-bouncing-in-the-develop-module-1644658/index2.html

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JohanElzenga

Community Expert

Update MacOS to 26.7.1 (or macOS 27) and the problem will be solved.

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-- Johan W. Elzenga

M

MIFKAP

Inspiring

Thanks Johan. That addressed the issue.

Does Adobe provide information about system requirements on a new release? That would have helped.

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JohanElzenga

Community Expert

Yes, they do, but that would not have helped in this case. What Adobe does is mention that Lightroom runs fine on MacOS Tahoe, not that it runs fine on all older versions of it. You should always keep your OS up to date, because updates are meant to fix bugs (among other things) and such a bug can cause something like this.

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-- Johan W. Elzenga

M

MIFKAP

Inspiring

I just updated to Lightroom Classic 15.6 Release: September 2026

I now have an issue on the Develop and Print Tabs where whenever I select a slider on the right hand side of the screen (i.e. in “Develop” - “Exposure”, “Contrast”, etc.) the slider automatically moves to the lowest value, and when trying to drag the slider, the mouse location is not on the eyedrop of the slider, rather is a distance to the right away from it.

I have tried disabling the GPU in preferences and have also restarted my machine with no change in the issue. Has anyone experienced this issue and have they found a fix?

System:

Mac Studio 2025 M4 Processor
128 GB
Tahoe 26.3
8 TB Hard drive.

Thanks in advance.

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Delightful_Symphony82cf

Participant

have an issue on light adjustment bar, while i try to click the spot using arrow the spot it self moving to begging of the adjustment line and i cant click it.

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JohanElzenga

Community Expert

You do not give information about your computer (always do that when you report a problem!), but I bet you use a Mac running MacOS Tahoe 26.3 or lower? If that bet is correct, then update MacOS to 26.7.1 and the problem will be over.

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-- Johan W. Elzenga

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Exuberant_Fireballb3bd

Participant

The sliders are not working accurately, for instance, If I want to set my exposure to -10, it goes all the way to -100.

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