Why Finder is slow on a Mac and the settings that make it faster
Finder is slow in a way that is hard to pin down. A folder takes four seconds to draw. The window opens empty and fills in gradually. Sorting by size makes the spinning pointer appear. Search returns nothing for a while, then everything at once. Nothing is broken, so nothing gets fixed, and the delay is absorbed dozens of times a day.
The causes are few and mostly identifiable within a minute. What makes the diagnosis difficult is that they produce similar symptoms through completely different mechanisms: one is a view setting, one is the search index, one is the network, one is cloud storage, and one is simply the number of items in a folder. This article separates them and gives the setting that addresses each.
Find out where the delay is
Before changing settings, one observation narrows the field enormously: is every folder slow, or only some?
Only some folders are slow. The cause is in those folders or their contents: item count, previews, a network or cloud location, or a damaged file. The next three sections apply.
Every folder is slow, including small local ones. The cause is system wide: the search index, free disk space, a Finder extension, or the disk itself. Skip to the later sections.
Only opening and saving is slow, not browsing. The open and save dialogs in other apps use the same machinery as Finder, including the sidebar. A sidebar entry pointing at an unreachable server delays every one of those dialogs while Finder waits for the server.
A quick control test: open Terminal and run ls -l on the folder that is slow in Finder. Terminal lists the names and sizes without drawing previews or calculating folder sizes. If the listing is instant in Terminal and slow in Finder, the delay is in what Finder is being asked to display, not in the disk.
View options that cost the most time
Two view settings do far more work than they appear to.
Calculate all sizes. In list view, this option makes Finder add up the contents of every folder in the window so it can show a size for each one. For folders containing large trees, that means walking thousands of files before the window settles. Open View Options with Command and J and clear the option. Finder then shows a dash for folder sizes and draws immediately.
Show icon preview. With this on, Finder generates a thumbnail from the contents of each file rather than showing a generic icon. In a folder of raw photos, videos or large documents, that is a great deal of work for a window that will be open for three seconds. The same View Options window has the switch, and it can be set per folder.
Two related choices help in heavy folders. List view draws faster than icon view, because it does not lay out a grid of images. Gallery view is the most expensive of all, since it renders a large preview of the selected item as well.
Sorting matters too. Sorting by name uses information Finder already has. Sorting by size or by kind in a folder with many items can require additional work per file. In folders of tens of thousands of items, sort by name and use search when something specific is needed.
Search, Recents, and the Spotlight index
Finder search is not Finder searching. It queries the Spotlight index, and the Recents view in the sidebar is a saved search against the same index. When the index is incomplete or rebuilding, both are slow or wrong.
Indexing is a normal background activity, and Apple notes how long a full pass can take:
Depending on the amount of data on your device, Spotlight indexing can take hours or even days. Incremental updates after that are much faster. Source: support.apple.com
That explains the slow week after a macOS upgrade or a restore from backup. It also explains why leaving the Mac on and plugged in overnight sometimes resolves what looked like a permanent slowdown.
Two settings are worth changing regardless.
Stop new windows from opening on Recents. In Finder, choose Settings, then General, and set "New Finder windows show" to a real folder such as the home folder. Recents runs a search every time a window opens. A plain folder does not.
Point search at the folder, not the whole Mac. In Finder Settings, under Advanced, set "When performing a search" to search the current folder. Whole Mac searches return far more results and take longer to display.
If search results are wrong as well as slow, the index for a specific disk or folder can be rebuilt. Apple's method is to open System Settings, go to Spotlight, open the Search Privacy list, add the disk or folder, wait a few seconds, then remove it again. Indexing of that location starts over.
Network shares and cloud folders
Network volumes are the single most common reason a Mac that is fast everywhere else feels slow in Finder. Finder collects metadata for each item before deciding how to draw the window, and over a network each of those requests costs a round trip.
Apple explains the behavior and offers a setting for it:
Your Mac determines how each window and its contents should appear by collecting file information such as labels, tags, and other forms of metadata. If a folder is sorted alphanumerically, the contents are displayed immediately, then the Finder collects and compares the rest of the folder's metadata. Source: support.apple.com
The same article gives a Terminal command that stops macOS from reading the hidden view files on SMB shares, which makes folders on those shares display immediately in alphanumeric order. It is aimed at administrators, and there is a trade-off: per-folder view settings no longer persist on those shares. For anyone who browses a large file server daily, that is usually a good trade.
Two habits help as much as the setting. Unmount shares that are not in use, so the sidebar does not wait on them. And remove sidebar entries for servers that no longer exist, since every open and save dialog tries them.
Cloud folders behave similarly for a different reason. When a provider keeps placeholders on the Mac and downloads contents on demand, a folder full of placeholders is a folder full of pending requests. Marking the folders used daily to stay downloaded, where the provider offers that option, removes the delay. For iCloud Drive, Apple's guidance for keeping a folder available locally is to keep it downloaded rather than optimized away.
Item counts, disk space and the desktop
Some slowness is arithmetic. A folder with 60,000 items in it will never draw as fast as one with 60, regardless of settings. Downloads folders that have not been cleared in years and Desktops used as a working surface are the usual examples, and the Desktop is worse because Finder draws it at login and keeps it drawn.
Splitting such folders into subfolders by year, project or type restores normal speed. Sorting by date added in list view makes the split quick to do.
Free space is the other arithmetic. When a startup disk is nearly full, everything slows down, because the system has no room for the temporary files it expects. df -h / in Terminal shows what remains. A few gigabytes free on a modern Mac is a problem to solve before tuning anything else.
The disk itself is the last item in this group. Run First Aid on the startup disk in Disk Utility. File system damage shows up as uneven slowness that no setting fixes, often concentrated in particular folders.
Tags, labels and stale sidebar entries
Two smaller causes are easy to miss because they seem unrelated to speed.
Tags are stored as metadata on each file, and Finder reads them while preparing a window. A Mac where thousands of files carry tags, particularly on a network share, pays for that on every listing. Tags are worth keeping when they are used for finding things, and worth removing when they were applied years ago and never searched. The Tags section of Finder Settings controls which ones appear in the sidebar, and removing a tag there does not delete it from files.
Stale sidebar entries are the other one. An entry for a server that is switched off, a folder on a drive that is no longer connected, or an old cloud location makes Finder attempt a connection each time the sidebar is drawn. Because every open and save dialog draws the same sidebar, the delay appears in other apps too, which sends people looking in the wrong place. Right-click each entry that leads nowhere and remove it from the sidebar.
Extensions and background apps
Finder extensions from cloud storage, backup and utility apps add work to every window: badges to draw, sync state to query, menu items to build. One that is slow to answer makes Finder slow everywhere.
The switches are in System Settings, under General, then Login Items & Extensions, where third-party extensions appear with a Finder checkbox. Turning them all off for an hour of normal work is a cheap test. If Finder becomes noticeably faster, turn them back on one at a time to find the expensive one.
Activity Monitor gives the other half of the picture. With the CPU tab open and the list sorted by CPU, a background helper that is constantly busy while Finder is slow is a strong suspect. Backup software, antivirus scanners and sync clients all show up this way. Scheduling their scans outside working hours is often the real fix.
Deciding what to change
| Symptom | Most likely cause | Setting to change |
|---|---|---|
| One large folder is slow | Calculate all sizes, icon previews | View Options, Command and J |
| All windows open slowly | New windows set to Recents | Finder Settings, General |
| Search is slow or empty | Spotlight index rebuilding | Wait, or rebuild via Search Privacy |
| Network folders crawl | Metadata over the network | Apple's SMB browsing setting |
| Cloud folders crawl | Placeholder downloads | Keep folders downloaded |
| Everything on the Mac is slow | Disk space or the disk | Free space, then First Aid |
Working through the table in the order the symptoms actually appear takes about fifteen minutes and usually ends the problem for good.
There is a further step some people take once the settings are tuned. Finder is designed to browse everything on a Mac, which is why it collects previews and metadata so eagerly. Day to day project work rarely needs any of that, and it moves between a folder, a terminal and, increasingly, an AI assistant. A file manager with a built-in terminal keeps those three in one window and lists folders without the preview work, which is why it feels immediate in folders where Finder hesitates. The features page sets out what that covers, and the comparison with other file managers puts it next to the alternatives.
What to change first
Open the slow folder, press Command and J, and turn off Calculate all sizes and icon previews, because those two account for most single folder slowness. Then set new windows to open on a real folder instead of Recents. If the slowness follows network or cloud folders instead, apply Apple's SMB browsing setting and keep the folders used daily downloaded. For project folders that need to feel instant all day, Atriens keeps the folder, a terminal and AI in one window.
Frequently asked questions
Why does Finder show the spinning pointer when I sort by size?
Sorting by size in a folder that contains other folders makes Finder calculate what is inside each of them. In list view this is controlled by the Calculate all sizes option in View Options, opened with Command and J. Turning it off removes the delay, at the cost of showing a dash instead of a size for folders.
Does clearing caches speed up Finder?
Rarely, and not reliably. The delays described here come from view settings, the search index, network and cloud requests, item counts and disk space. Safe mode clears some system caches as part of starting up, which is a safer way to test that theory than removing cache files by hand.
How long should Spotlight indexing take after a macOS update?
Apple states that a full index can take hours or even days depending on how much data is stored, with incremental updates being much faster afterwards. Indexing finishes sooner when the Mac is connected to power, on a network, and not in use, so leaving it on overnight is the practical answer.
Is Finder slower on network drives than other file managers?
Finder collects metadata such as labels and tags for the items in a window before drawing it, which costs a round trip per item over a network. Apple documents a setting that skips part of that work on SMB shares and displays contents in alphanumeric order immediately. Tools that do not collect the same metadata list network folders faster, with correspondingly less information shown.