iMac goes crazy when adjusting curves in PS CS20

Question

Recently bought and installed an Epson SC 600P printer. Now when working on curves in a B&W image my Mac starts doing stuff on its own. The trackpad goes hyper sensitive and changes screens, carries out actions without me touching it. Phoned my friend last night! I can't hit the 'stop' button. Have to power down the machine!

I have virus and malware checked my machine and it's clear of infection.

Anyone else experiencing this?

c.pfaffenbichler · Answer

Please read this (in particular the section titled "Supply pertinent information for quicker answers"):

https://community.adobe.com/t5/Community-Help/Guidelines-Tips-for-the-Adobe-Forums/td-p/4788157

What have you done for trouble-shooting so far?

Restoring Preferences after making sure all customized presets like Actions, Patterns, Brushes etc. have been saved might be a good starting point:

https://helpx.adobe.com/photoshop/kb/basic-trouble-shooting-steps.html

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