How to Add Plugins to GarageBand

To add plugins to GarageBand on your Mac, install the plugin as an Audio Unit (AU), restart GarageBand so it can scan and validate it, then load it on a track from the Smart Controls plug-in slots. GarageBand only recognises Audio Units, so a plugin has to be in AU format before it will show up. Below we walk through the whole thing in order, then cover the reasons a plugin sometimes refuses to appear.

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What kind of plugins work in GarageBand

This is the single most common source of confusion, so it’s worth clearing up before you download anything. GarageBand on the Mac supports the Audio Units format — often written as AU or AUv2. It does not load VST or VST3 plugins, which is the format most Windows DAWs use. If you buy or download an effect or instrument, check that an Audio Units (or “Mac / AU”) version is included. Most reputable developers ship AU alongside VST, so this is rarely a dealbreaker — you just have to pick the right installer or the right checkbox during installation.

GarageBand on iPhone and iPad is a different story: it uses Audio Unit Extensions (AUv3), which you install as apps from the App Store and then load from inside the app. The rest of this guide is about GarageBand on macOS, where the vast majority of plugin work happens.

How to add plugins to GarageBand step by step

Here is the full workflow from a fresh download to a loaded effect. Do these in order the first time and it becomes second nature after that.

1. Install the plugin. Run the developer’s installer (usually a .pkg or .dmg). During installation, make sure the Audio Units / AU component is ticked. On a Mac, AU plugins are placed in /Library/Audio/Plug-Ins/Components (all users) or ~/Library/Audio/Plug-Ins/Components (just you). You normally don’t touch these folders by hand — the installer does it — but it’s useful to know where they live if you ever need to troubleshoot.
2. Quit and reopen GarageBand. GarageBand scans and validates Audio Units when it launches. If GarageBand was already running when you installed, it won’t see the new plugin until you fully quit (Cmd-Q) and reopen it.
3. Select the track you want the plugin on in the track list on the left. An effect plugin goes on whatever track you want it to process; a software instrument plugin goes on a Software Instrument track.
4. Open Smart Controls. Click the Smart Controls button (the dial icon) in the control bar at the top, or press the B key. The Smart Controls panel opens at the bottom of the window.
5. Show the plug-in area. In Smart Controls, open the inspector — the small “i” or inspector button in the Smart Controls header. This reveals a channel-strip view with the track’s Plug-ins section, showing slots stacked vertically.
6. Load the plugin. Move your pointer over an empty plug-in slot and click. In the menu that appears, hover over Audio Units, choose the manufacturer, then choose the plugin. It loads into the slot and its window opens so you can start tweaking.

That’s it — the plugin is now in the signal chain and processes audio from top to bottom through the slots. To open a plugin’s interface again later, double-click its slot.

Adding effect plugins versus instrument plugins

The mechanics are almost identical, but it helps to understand the difference. Effect plugins (EQ, compression, reverb, saturation and so on) sit in the plug-in slots on any track — audio or software instrument — and shape the sound that passes through. You can stack several, and the order matters: a compressor before a reverb sounds different from a reverb before a compressor.

A software instrument plugin is the sound source itself. On a Software Instrument track, the top slot in the Plug-ins section is the instrument. Click it and, under Audio Units, you can swap GarageBand’s built-in instrument for a third-party AU instrument. Once it’s loaded, the notes you record or draw in the piano roll play through that instrument. Effect slots below the instrument then process its output.

If you’re building a track largely from AU instruments and samples and you want a fully original starting point to arrange around, an AI tool like Solmi can generate royalty-free base material you then produce inside GarageBand.

Where good third-party plugins actually help

Be honest with yourself about whether you need a third-party plugin at all. GarageBand’s stock effects are genuinely capable — the Channel EQ, Compressor, and the reverbs and delays will get you a long way, and for a lot of tasks they’re all you need. Reach for a third-party plugin when you want something the stock set doesn’t do well: a characterful analogue-style EQ or compressor, a specialist vocal tuner, a convolution reverb, or a synth with a bigger sound-design palette.

When you do go shopping, buy from a marketplace that clearly lists Mac/AU compatibility so you don’t end up with a VST-only download. Plugin Boutique is a solid place to browse AU-compatible effects and instruments, and it regularly runs free plugins worth grabbing to expand your stock toolkit.

You don’t always need to spend, either. For quick jobs you can lean on free browser tools — our own free audio tools include a tuner, metronome, and BPM finder that pair nicely with a GarageBand session without installing anything. And if you’re still learning what each processor does, our primer on EQ and compression fundamentals will help you use whatever plugin you load more effectively.

When a plugin won’t show up: common problems and fixes

If you installed a plugin and it isn’t in the Audio Units menu, work through these in order — one of them is almost always the cause.

• You didn’t restart GarageBand. The most frequent culprit. Fully quit with Cmd-Q and reopen; GarageBand rescans Audio Units on launch.
• You installed the wrong format. If only the VST/VST3 component was installed, GarageBand can’t see it. Re-run the installer and make sure the Audio Units option is selected.
• The plugin failed AU validation. macOS runs the auval validation tool on Audio Units, and GarageBand hides plugins that fail. This often means the plugin needs an update for your current macOS version — check the developer’s site for the latest build.
• The plugin isn’t authorised. Many paid plugins won’t load until you’ve activated a licence or signed into the developer’s account manager. An unauthorised plugin may install but stay greyed out or silent.
• Apple silicon vs Intel. On Apple silicon Macs (M-series), a plugin needs a native or universal build, or you must run GarageBand under Rosetta for older Intel-only plugins. Grab the current version from the developer first — most have gone native.
• You’re on iOS. Remember, GarageBand for iPhone/iPad uses AUv3 app extensions, not the Mac’s Components folder. Install the plugin’s app, then load it from the plug-in area inside the mobile app.

If everything checks out and a specific plugin still fails, the developer’s support page usually lists the exact macOS and GarageBand/Logic compatibility — that’s the fastest way to confirm whether the problem is the plugin or your setup.

Managing, reordering and removing plugins

Once you’ve got a few plugins running, keep the chain tidy. In the Plug-ins section of Smart Controls you can bypass a plugin by clicking the power/on-off control on its slot — handy for A/B comparisons without deleting anything. Reorder effects by dragging a slot up or down, which changes the processing order. To remove a plugin, click its slot and choose No Plug-in from the menu. Because plugins add CPU load, bypassing or removing ones you’re not using keeps playback smooth on busier projects. If you find a chain you like, GarageBand lets you save it as part of a patch so you can recall it on future tracks.

Frequently asked questions

Can I use VST plugins in GarageBand?

No. GarageBand on the Mac only loads Audio Units (AU) plugins, and GarageBand on iOS loads AUv3 extensions. It cannot host VST or VST3 directly. Most developers ship an AU version alongside the VST, so choose that installer. If a plugin is VST-only, you’d need a DAW that hosts VST instead.

Where do plugins install on a Mac?

Audio Units install to /Library/Audio/Plug-Ins/Components for all users, or ~/Library/Audio/Plug-Ins/Components in your home Library for just your account. The installer normally handles this automatically — you rarely need to open these folders yourself unless you’re troubleshooting a stubborn plugin.

Why doesn’t my new plugin appear in the Audio Units list?

Almost always because GarageBand hasn’t rescanned yet — quit fully with Cmd-Q and relaunch. If it still doesn’t appear, confirm you installed the AU (not VST-only) component, that the plugin is authorised, and that it’s a current build compatible with your macOS version and Mac chip.

Want a wider view before you invest in plugins? See our roundups and guides on the Home Studio Setup hub, our explainer on what a VST is and why format matters, our list of the best free DAWs for beginners, and our walkthrough on how to mix vocals once your plugins are in place.