Common Mac problems,
clearly solved
Performance 8
PerformanceYour Mac's fans never settleYour Mac's fans never stop, even when it feels idle. Check whether macOS is throttling, what's holding it awake, and which job never finishes.PerformanceYour Mac's beach ball won't stop spinningThe spinning beach ball means one app stopped answering. How to tell whether it will recover, force quit it safely, and what you lose if you do.PerformanceGames stuttering or dropping frames on your Mac?Choppy games and low FPS on a Mac are usually heat, background apps, or Game Mode being off — not weak hardware. How to find which, and the exact fix.Performancecom.apple.WebKit.WebContent is eating your Mac. Here's what it actually is“WebThumbnailExtension Web Content” or com.apple.WebKit.WebContent hogging Activity Monitor? Not a virus. How to find the one eating CPU and stop it.PerformanceChrome is eating your Mac's memory. Here's whyChrome runs every tab, site, and extension as its own little program — that's why it multiplies memory. How to find the one tab responsible, and the settings that actually help.PerformanceYour Mac's swap is huge. Here's what that meansHigh “Swap Used” in Activity Monitor? Your Mac ran out of RAM. How to clear swap memory safely — quit the right apps or restart — and keep it down.PerformanceWhy is my Mac so slow?A slow Mac is almost never just old — it's usually one specific thing eating processor, memory, or disk. How to find which — and the exact fix for each.PerformanceMacBook running hot with the fans roaring?A hot MacBook with loud fans almost always means one process is overworking the chip, or heat can't escape. How to find which — and the exact fix.
Storage 2
Storage“Purgeable” space eating your disk?Your Mac's disk is full but your files don't add up, and a chunk shows as “purgeable” or “System Data.” It's usually local Time Machine snapshots. How to see them and clear them safely.StorageMac storage is fullYour Mac says the disk is full but your own files don't add up. Here's how to find where the space really went — including the mysterious “System Data” — and get it back safely.
Power 3
PowerMacBook battery draining fast?A MacBook battery draining fast is usually one app pinning the processor, an app holding the Mac awake, or a worn battery. How to tell which.PowerMacBook waking from sleep on its own?A Mac that wakes itself up — draining battery in your bag or lighting up overnight — is almost always a Bluetooth device or network activity. How to read the wake log and stop it.PowerMac shutting down or restarting by itself?A Mac that powers off or restarts on its own is almost always heat, power, or one crashing program. How to find which — and the exact fix for each.
Network 3
NetworkConnected to Wi-Fi, but nothing loads?Your Mac says it's connected and no page will open. Four commands find exactly which link in the chain is broken — your Mac, the router, the internet, or the name lookup — and each has a different fix.NetworkDNS is not working on your Mac. Pages fail while the connection looks fine.When DNS fails, your Mac is online but cannot turn website names into addresses. Learn the one test that proves it, and the causes worth checking in order.NetworkMac Wi-Fi keeps dropping or crawling?Wi-Fi that drops or crawls on a Mac is almost always a weak signal, a slow website lookup, or a stale setting. How to find which — and the exact fix.
Peripherals 2
PeripheralsYour Mac says the printer is offline. One command tells you why.macOS says your printer is offline. That can mean a paused queue, a stuck job, or a printer your Mac can't reach. Each has a different fix.PeripheralsBluetooth keeps disconnecting on your Mac?Bluetooth that keeps dropping on a Mac is usually interference, a low accessory battery, or a stale setting. How to tell which — and the fix.
Apps 8
AppsOneDrive will not finish syncing on your Mac. Here is what to check.OneDrive sits on Processing changes for hours on your Mac. Learn whether it is still working, or whether a file, your storage or the sign-in stopped it.AppsDropbox has stopped syncing on your Mac. Here is what to check.Dropbox sync stops for a few reasons: paused syncing, a full account, a locked file, or an unsupported name. Here is how to tell which one, in order.AppsChrome keeps crashing on your Mac. The crash evidence can tell you whySeparate Chrome tab crashes, freezes, and full app crashes. Check local crash reports, memory pressure, enabled extensions, profiles, and graphics acceleration.AppsCreative Cloud keeps asking you to sign in. Here is what to check.When Creative Cloud will not stay signed in on a Mac, the cause is usually a saved credential, a blocked connection, or a wrong clock. Learn how to tell which.AppsFinder keeps crashing or relaunching. Here is what to check.Finder quitting and reappearing usually means it cannot read something: an add-on, a stalled drive, or saved view settings. Learn how to tell which, in order.AppsSafari keeps crashing or quitting unexpectedly?Safari crashing, quitting unexpectedly or closing on its own? Almost always a bad extension, a full cache or a stuck page. How to find which, and fix it.AppsApple Mail keeps crashing or quitting?Mail quitting the moment you open it, or crashing on one message, is almost always a corrupt index, a bad message, or an old plugin. How to find which — and the fix.AppsInDesign, Photoshop or Illustrator won't open after macOS Tahoe?Adobe apps that hang on launch after upgrading to macOS Tahoe are usually stale preferences, not a broken install. Four checks, in order, starting with the cheapest.
Security 1
Updates 1
Errors 6
ErrorsA FileProvider error names a number. Which cloud app failed?NSFileProviderErrorDomain means one of your cloud apps failed a file operation — not macOS itself. Learn what each code means, which provider is behind it, and what to check before deleting or unlinking anything.ErrorsError -5009: the number is undocumented. The provider is diagnosable.NSFileProviderErrorDomain error -5009 has no published meaning — Apple does not define it and no provider documents it. What you can do instead: confirm this is your failure, find which file provider owns it, and check the three things that cause most FileProvider failures.Errors“Your system has run out of application memory” on a MacThe macOS dialog does not mean your RAM is full. How to get control back, and the three causes: a runaway app, a full boot disk, or too little RAM.Errors“Disk Not Ejected Properly” on a Mac: what dropped, and whenThe alert means a drive stopped answering before macOS could unmount it. Your Mac's log records which device dropped and when. Here is how to read it.ErrorsThe operation can’t be completed because the item “name” is in use: what to check on a MacThe error behind this Finder message is a busy result from a disk or file server. Open files alone did not cause it in our tests. Here is what to check on network shares, NAS drives, and local disks.ErrorsFinder error -36 means the copy hit an I/O failure. Find out whereMac error -36 is an input/output error during a file copy or move. Isolate the file or disk causing it before trying dot_clean, First Aid, or a reformat.
Processes 8
Processestccd is using high CPU. Which app is it checking permissions for?tccd answers privacy permission checks on your Mac. Learn when its CPU use is normal, and how to find and test the app behind a spike.Processescontactsd is using high CPU. Which Contacts account is stuck syncing?contactsd manages the contacts on your Mac. Learn when its CPU use is normal, how to find the one account causing a sync loop, and how to keep your contacts syncing.Processespeopled is using high CPU. What is it stuck on?peopled is a macOS background process tied to Contacts. Learn how to tell ordinary work from a loop, the widget and account causes reported on Tahoe, and what to leave alone.Processesmdworker_shared is using high CPU. Which file is Spotlight stuck on?mdworker_shared reads individual files so Spotlight can index them. Learn when the load is ordinary indexing and when one file or plug-in is causing it to repeat.Processesphotoanalysisd is using high CPU. Is Photos still analyzing your library?photoanalysisd scans your Photos library for faces, scenes and Memories. Learn when high CPU is expected, when it looks stuck, and what to check before changing anything.ProcessesWindowServer is using lots of memory. The cause is usually on screenWindowServer draws everything on your Mac's displays. Diagnose high memory using display load, open windows, screen sharing, memory pressure, and changes over time.ProcessesThe bird process is using high CPU. Is iCloud syncing or stuck?bird is tied to iCloud Drive syncing on your Mac. Learn when its CPU use is expected, what stalled syncing looks like, and what Noah can inspect.Processesmds_stores is using high CPU. Is Spotlight busy or stuck?mds_stores powers the Mac's Spotlight index. Learn when high CPU is normal, when indexing may be stuck, and what to check before rebuilding it.
Performance 1
Storage 1
Errors 1
Gaming 2
GamingValorant crashing or freezing?Valorant crashes to desktop, freezes on the loading screen, or locks up your whole PC — usually Vanguard, graphics drivers, or overheating. How to tell which, and the exact fix.GamingGames stuttering or dropping frames on your PC?Stutter and frame drops on a Windows PC are usually shader compilation, a power plan throttling the CPU, overheating, or background apps — not a weak graphics card. How to find which.
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