How to Fix Adobe Acrobat Excessive Memory Usage on macOS Mojave
Question details
The user needs to resolve an issue where the PDF reader consumes an excessive amount of memory over time, eventually causing the Mac to run out of application memory.
- Product
- Adobe Acrobat
- Device & OS
- macOS Mojave
- Scenario
- Opening and closing multiple PDF files during normal workflow.
- Observed behavior
- The application progressively consumes more virtual and physical memory (sometimes climbing to over 30GB) without releasing it, triggering a macOS out-of-memory error.
Save all your ongoing work and close unnecessary background applications to free up immediate RAM, as troubleshooting will require restarting your software and system.
Update Software to Patch Memory Leaks
Installing the latest updates for both the PDF application and your operating system is the most reliable way to fix known programming bugs like memory leaks.
A memory leak occurs when a program continually consumes memory without properly releasing it back to the operating system. Since there is no manual setting in Acrobat to cap memory usage, patching the software via official updates is the primary solution.
Open Adobe Acrobat, navigate to the 'Help' menu in the top menu bar, and select 'Check for Updates'. Follow the prompts to install any available patches.
Click the Apple menu in the top-left corner of your screen, select 'System Preferences', and click 'Software Update'. Install any pending updates for your Mac.
Once all updates are installed, restart your Mac to clear the system cache and reset the virtual memory allocation.
Isolate Problematic PDF Files and Plugins
Testing different files helps determine if the excessive memory usage is triggered by a specific document's complexity rather than the application itself.
Use WPS Office as a Lightweight PDF Alternative
If your current PDF reader continues to drain your Mac's memory, consider switching to WPS Office. It includes a built-in, highly optimized PDF reader and editor that handles large files smoothly without causing system memory leaks.
- 1. Download the installer: Visit the official WPS website and download the free WPS Office suite for Mac.
- 2. Open your PDF: Launch WPS Office, click on 'PDF' in the sidebar, and select your file to experience fast, low-memory rendering.
Frequently Asked Questions
Is there a setting in Adobe Acrobat to manually limit memory usage?
No, there are no internal settings in Adobe Acrobat that allow you to cap or limit RAM allocation. Memory management is handled dynamically by your operating system.
Why does my Mac say virtual memory has climbed to over 30GB?
When an application experiences a memory leak, it constantly requests more memory. To prevent an immediate crash, macOS moves data from your physical RAM to your hard drive (virtual memory). If the leak continues, virtual memory can inflate to dozens of gigabytes.
Do large PDF files automatically cause memory issues?
Large files (e.g., those containing high-resolution, print-ready photos) will naturally consume more RAM—often jumping by several hundred megabytes. However, normal behavior involves the application releasing that memory when the file is closed. A memory leak is indicated only when the memory usage continually climbs and never drops back down.
