Overview presents current system information to help you understand what the Mac is doing. Readings change continuously and should be interpreted over time and in context.
Processor and GPU
CPU or GPU activity rises when applications compute, render, index, encode media, or update. A brief high reading is normal. Investigate activity that stays high while the Mac is idle or corresponds with heat, battery drain, or poor responsiveness.
Use Activity Monitor to identify the responsible process. diCleaner’s summary is a starting point, not a replacement for per-process diagnostics.
Memory
macOS intentionally uses free memory for cache. Focus on sustained memory pressure, repeated swapping, or applications becoming unresponsive rather than expecting a large amount of unused RAM.
Close applications you no longer need before using a memory action. If pressure returns immediately, identify the process consuming memory.
Disk
Disk capacity shows used and available storage for supported volumes. Values can differ from Finder or System Settings because purgeable space, snapshots, caches, and calculation timing are handled differently.
Use Space Analyzer to investigate file-level distribution. Do not infer that all used space is removable.
Battery
Battery status can include charge, power source, and supported health information. Battery drain depends on brightness, radio use, application workload, connected devices, temperature, and battery age.
A short observation is not enough to evaluate battery health. Compare behavior under similar workloads.
Refresh behavior
Overview polls system data periodically. A reading may lag a rapid change slightly. If a section is unavailable, the Mac model, permission, connected hardware, or macOS support may not provide that metric.