Storage and speed on a Mac, fixed in plain English.
13 fixes for macOS 26 Tahoe and macOS 27 Golden Gate.
Ctrl+Alt+Delete on a Mac: how to force quit a frozen appThe app stopped responding.The Mac's Task Manager: see what's using CPU and memoryActivity Monitor shows every running app and process, and how much CPU, memory and energy each uses."Your startup disk is almost full" on a Mac: free up spaceThe internal drive is nearly full, which also slows the Mac.Your Mac is slow: find out why and speed it upToo many apps open, too little free memory or disk space, one app working too hard, or the Mac hasn't restarted in a long time.See how much storage you have left on your MacThe Storage pane shows used and free space by category.Your Mac is hot and the fan is loud: how to cool it downHeavy work, blocked vents, indexing after an update or a runaway app produce heat.Your Mac is slow after a macOS update: what's going on and what to doAfter an update Spotlight, Photos and iCloud rebuild their indexes in the background for hours or days.Mac says "Your system has run out of application memory"Apps are using more memory than the Mac has, so it relies on slower disk swap.Check or repair your Mac's disk with Disk Utility First AidDisk Utility's First Aid checks the drive's structure for errors.Find the app that's hogging your Mac's CPUA single app or helper process is stuck or very busy.See how much RAM your Mac has and which chip is insideAbout This Mac shows the chip, memory and macOS version.Find big files and downloads to delete on your MacA few big files (videos, disk images, old installers) often use most of the space.Make room when your Mac says there's not enough space to updatemacOS updates need many GB of free space to download and install.