Add more RAM/Memory to InDesign

Using Get Info to assign memory to applications manually on a Mac was a feature in Classic Mac OS, a long time ago. When Apple transitioned to Mac OS X around 20 years ago, memory management became fully automatic, so Apple removed the memory setting from Get Info. The problem with the old way was that the memory assignments were hard walls that could not adapt or be moved as different programs were used, it was too limiting.

Today both macOS and Windows use fully automatic memory management. The system constantly adjusts memory depending on the current needs of all running apps. If InDesign actually needs more memory, it will request it from macOS, which will provide it if available. And it is not just a matter of assigning memory, because for increased overall efficiency, the system can also compress RAM or swap it to the drive. With all these memory management options, it is now too complicated for a person to manage manually.

Your Mac has 32GB RAM, which is a lot more than InDesign usually needs. Can you tell us why you think it needs more memory? Is it actually displaying an Out of Memory message? Does it seem slow? If you describe what the problem is, we can help figure out what the real cause is, because it might not be about memory.

Photoshop and the Adobe video applications do let you apply a memory amount, but it is the opposite of what you want. The memory settings in those applications do not allocate more memory; instead they limit how much memory the application can receive, so that they don't take too much from other applications that you might need to run at the same time.