On a Mac,Activity Monitoris the primary tool for monitoring system resource usage, including the amount of memory (RAM) consumed by individual apps. Found in Applications > Utilities, it provides a real-time view under the "Memory" tab, showing memory usage in megabytes or gigabytes per app, along with system-wide statistics.
Option A (Console) logs system events and errors but doesn’t display memory usage.
Option B (Apple Diagnostics) tests hardware integrity, not runtime memory stats.
Option C (System Information) offers hardware and software details (e.g., total RAM) but not per-app memory usage.
Option D (Activity Monitor) is correct and widely used for this purpose.This functionality remains consistent in macOS up to 2025. Refer to Apple’s "Use Activity Monitor on your Mac" (support.apple.com/HT201464) for details.
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