It is suddenly impossible to open more than one file at a time in AI. Why, and what can be done?
That's it. If I want to paste an illustrator-drawn device into a Photoshop file, I can't do it the way I would like to. Meaning, in Illustrator: open the Photoshop file, open the Illustrator file with a lot of pre-drawn devices in it, select one and passte it into the photoshop file on hand, which is not the final PS file, but will serve to get the size and position right. Then I copy it and return to PS to do the actual pasteup. That's how I've always done it- for about 20 years. If I try that now, either I can't open the Illustrator file to select a device, or I can't open the PS file in AI in the first place- I have to open the AI source file, get the device, close AI and go to PS and paste it up. Old Mac Pro, running Mojave, 48GB RAM. I don't think it's due to lack of RAM.