WhySlow
What is photoanalysisd on Mac?
Finds faces, objects and memories in your Photos library.
Why is photoanalysisd using so much CPU?
Busy after importing many photos or a macOS update. It mostly works while your Mac is idle and plugged in.
Should you quit photoanalysisd?
No. photoanalysisd is part of macOS. Quitting it can break things, and macOS starts it again anyway. When it is busy, it usually runs while plugged in.
Is photoanalysisd a virus?
No. photoanalysisd is a genuine part of macOS, signed by Apple and stored in a protected system folder that apps can't change. Malware sometimes borrows familiar names, so if a process called photoanalysisd lives outside /System or /usr, or you see it after installing something unusual, run a check with a trusted tool and keep macOS up to date.
How to check photoanalysisd on your Mac
Open Activity Monitor (Applications › Utilities), choose the CPU tab and type photoanalysisd in the search field. The % CPU column shows how busy it is: 100% means one full processor core. The Memory tab shows how much memory it uses. Activity Monitor shows numbers but doesn't say what they mean; WhySlow explains photoanalysisd in plain English and only flags it when it is really slowing your Mac down.
What to do if photoanalysisd stays busy
- Leave your Mac plugged in and awake for a few hours. Photos analysis mostly runs when you aren’t using the Mac and pauses when you start working.
- After importing a large library, expect it to take a day or two. It finishes on its own.
- If it never settles, open Photos once and let it finish syncing with iCloud Photos.
How WhySlow helps with photoanalysisd
- Shows how much CPU and memory photoanalysisd is using right now, in plain English.
- Tells you when photoanalysisd is the real cause of a slow Mac, and when it isn't.
Free to explain. $7 once for one-click fixes.