Photoshop will not let me "untick " the Active box in the Scratch Disk Window

New Here ,
Apr 23, 2021 Apr 23, 2021

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Hi, I want to untick the check box as i am getting messages that my scratch disk is full, but Photoshop will not let me. 

 

Can someone help please? thanks

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How to, Mac, Performance, Problem or error

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Adobe Community Professional ,
Apr 23, 2021 Apr 23, 2021

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You don't understand. Photoshop can't work without a scratch disk. It can't open, it can't run.

 

Raster image editing requires moving large amounts of data, much more than any RAM you may have installed. So Photoshop writes this temporary working data to disk. This is the scratch disk.

 

The scratch disk is Photoshop's main memory, with RAM as a fast access cache.

 

You should have at least 50-100 GB free disk space for the scratch disk. That's absolute minimum. To operate optimally, 500 GB is a more realistic figure.

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New Here ,
Apr 23, 2021 Apr 23, 2021

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ok thanks, so i need to clear space on my hard drive?

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Adobe Community Professional ,
Apr 23, 2021 Apr 23, 2021

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Exactly. The more the better.

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Adobe Community Professional ,
Apr 23, 2021 Apr 23, 2021

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Run, don't walk, to the store and buy an external hard drive. A full startup drive is just asking for huge problems from macOS, not just Photoshop. You need to clear maybe 50-100GB of space.

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