GarageBand Plugins: Formats, Install Steps and the Best Free AU Picks

Last updated: October 31, 2026

Quick answer: GarageBand on Mac loads Audio Unit (AU) plug-ins only. VST and VST3 files do not appear. Put AU plug-ins in /Library/Audio/Plug-Ins/Components and restart GarageBand. Good free picks are Voxengo SPAN, TDR Nova, Valhalla Supermassive, Helm and Dexed. GarageBand on iPhone and iPad uses AUv3 apps from the App Store instead.

This page is part of our complete GarageBand vocals guide, which walks through recording, the vocal chain, presets and mixing in one place.

For reverb and delay times at any tempo, use the reverb and delay settings cheat sheet for vocals.

To work through a full vocal session in GarageBand, read how to mix vocals in GarageBand.

GarageBand's built-in effects cover the basics. Free third-party plug-ins fill the gaps: a way to see your mix, a bigger reverb, a better synth. This guide covers which GarageBand plugins work, how to install them, and which free ones are worth your time. Developers update their downloads, so check each page for your macOS version and Apple silicon support.

What plug-in formats does GarageBand support?

This is the most common question about GarageBand plugins, and the answer is short.

• Mac: GarageBand loads Audio Units (AU). It does not load VST, VST3 or AAX files. If a developer offers several formats, download the AU one.
• Why there is no GarageBand VST support: Apple built GarageBand around its own plug-in format. A VST file on your drive stays invisible to it.
• iPhone and iPad: GarageBand supports AUv3 apps. You install them from the App Store, and they are separate from the Mac plug-ins below. We have not tested every step on iPhone and iPad, so check each app's page for GarageBand support.
• Wrappers: Some tools claim to turn a VST into an AU. Results vary, and some cause crashes. We do not recommend them for beginners.

Many installers put the AU, VST and AAX versions on your Mac in one run. Pick "AU" or "Audio Unit" in the installer's options if it asks.

How to install an AU plug-in on Mac

1. Download the Mac installer from the developer's own site. Choose the AU format.
2. Run the installer. Most installers place the file for you.
3. If you get a plain .component file, copy it to /Library/Audio/Plug-Ins/Components. This folder makes the plug-in available to every user on the Mac. A per-user copy also works in ~/Library/Audio/Plug-Ins/Components.
4. Quit GarageBand fully with Command-Q, then open it again. GarageBand checks new plug-ins at launch.
5. Open GarageBand > Settings (Preferences in older versions). Look in the Audio/MIDI tab or the Plug-ins tab and make sure Audio Units are enabled.
6. Open a new blank project and load the plug-in on a track to test it.

Apple lists the same steps in its support guide for Audio Units in GarageBand.

How to open a plug-in on a track

1. Select a track.
2. Open the Smart Controls (press B, or click the knob icon).
3. Click the Plug-ins section, then click an empty slot.
4. Choose Audio Units, then the developer name, then the plug-in.
5. Click the plug-in's name in the slot to open its window.

Effects load in these slots. Instrument plug-ins load in the instrument slot of a Software Instrument track. Use the Audio Units submenu there too.

Best free effect plug-ins for GarageBand

These are free GarageBand add ons for mixing. Each has an AU version for Mac. The last column gives a start point, not a final answer. Control names change between versions, so match the idea, then use your ears.

Plug-in	Type	Best use	One start setting
Voxengo SPAN	Analyzer	See where a vocal is muddy or harsh before you EQ.	Set the FFT block size to 4096 or higher. It gives a steady view of low frequencies.
TDR Nova	Dynamic EQ	Tame harsh vocal ranges only when they get loud.	Make one dynamic band near 3 kHz with a medium Q. Aim for 2 to 3 dB of cut on the loudest words.
Valhalla Supermassive	Reverb and delay	Large spaces on vocals and ambient sounds.	Set Mix to about 15 percent. Raise it only if the vocal still sounds dry.
Auburn Sounds Graillon Free	Pitch and voice	Pitch correction and voice effects.	Set the scale to your song's key. Start with a gentle correction amount and raise it slowly.
CamelCrusher	Distortion and compression	Add grit to drums and bass.	Set distortion to zero and compression to about 3 out of 10. Add grit after that.
iZotope Vocal Doubler	Doubler	Wider chorus lines.	Set the mix low, near 25 percent, so the double stays behind the lead.

Match the output level to the bypassed level with each plug-in. A louder sound often feels better, even when it is not.

Best free instrument plug-ins for GarageBand

GarageBand ships with good sounds. These free instrument plug-ins add synth tones and pianos.

Plug-in	Type	Best use	One start setting
Helm	Open-source synth	Basses, leads and pads.	Load a factory patch. Set the filter cutoff to the middle and move it while you play.
Dexed	FM synth	Electric piano and bell tones. It reads classic DX7 sounds.	Load a patch from a DX7 bank and lower the master volume first. Some patches are loud.
TAL-NoiseMaker	Analog-style synth	Quick synth parts from presets.	Browse presets while a loop plays. Pick one that sits in the key before you edit.
Spitfire Audio LABS Soft Piano	Sampled piano	Soft, intimate piano for ballads.	Play at low velocity. Add a little reverb in GarageBand instead of inside the plug-in.
Surge XT	Open-source synth	Deep sound design when you want more control.	Start from a factory patch. Change one control at a time.

For house basslines, see free house bass plug-ins for GarageBand.

Plug-ins for vocals

A vocal chain needs EQ, compression, de-essing and reverb. GarageBand includes all four. A free plug-in such as SPAN helps you see problems. TDR Nova handles harsh spots. Supermassive adds space. Adding more plug-ins does not fix a poor recording, so check your input level and room first.

Read GarageBand vocal effects to learn what the built-in tools do and in what order to use them. Our auto-tune guide explains pitch correction.

If you want a complete vocal chain without searching for plug-ins, load a ready-made GarageBand patch. The Vocal Effects Variety Pack for GarageBand ($25), the GarageBand Starter Pack ($19) and the Vocal Preset Mega Bundle for GarageBand ($49) use GarageBand's own effects, so you do not need to install anything else. Learn how in GarageBand vocal presets: how to install and use them, or browse the GarageBand vocal presets collection.

GarageBand add-ons that are not plug-ins

Some people search for "garageband add ons" and want more than plug-ins. GarageBand has other ways to grow.

• Apple Loops and sound packs: Open the Sound Library in GarageBand to download free loops, drum kits and instruments from Apple.
• Instrument and channel strip patches: A patch saves a set of effects and settings on one track. You can share or buy patches. Vocal presets for GarageBand work this way.
• Third-party loop packs: Audio files that you drag into a project. They are not plug-ins and need no install.
• Sampler instruments: Apple's Sampler and Quick Sampler load your own sounds and need no extra download.

Each of these works without the Components folder. They are the simplest place to start if plug-ins feel like too much.

Troubleshooting GarageBand plug-ins

The plug-in is missing

Check that the file is in a Components folder and ends in .component. Quit GarageBand with Command-Q and open it again. Confirm that Audio Units are enabled in Settings. A VST or VST3 file will never show up.

GarageBand says the plug-in is not validated

GarageBand tests each new AU when it opens. A plug-in that fails the test is skipped. Reinstall the latest version from the developer's site. Then restart your Mac and open GarageBand again. If it still fails, the plug-in does not support your macOS version.

GarageBand crashes with a plug-in

Remove the newest plug-in from the Components folder and open GarageBand again. Add plug-ins back one at a time. Test each one in a blank project.

Apple silicon and Rosetta

Newer Macs use Apple silicon chips. A plug-in built only for Intel Macs may not load in a native GarageBand. Look for "Apple silicon", "ARM" or "Universal" on the download page. You can also open GarageBand under Rosetta (select the app in Finder, choose Get Info, then tick Open using Rosetta) so an older Intel-only plug-in loads. We have not tested this with every plug-in. An updated plug-in is the better fix.

Install safely

1. Download only from the developer's site.
2. Check that the download lists macOS and AU.
3. Test each new plug-in in a blank project before you use it in a real one.
4. Keep a list of what you installed, so you can remove anything that causes crashes.

Frequently asked questions

Are free GarageBand plugins safe?

Plug-ins from known developers are safe. Download from their own sites, not from file-sharing pages.

Do VST plugins work in GarageBand?

No. There is no GarageBand VST support on Mac. Use the AU version of the plug-in.

Where do I put GarageBand plug-ins on Mac?

Put AU files in /Library/Audio/Plug-Ins/Components. Restart GarageBand after you install.

Can I use plug-ins on GarageBand for iPhone or iPad?

You can use AUv3 apps. They come from the App Store, not from the Mac folder. We have not tested every step on iPhone and iPad.

What is the best free reverb for GarageBand?

Valhalla Supermassive is a popular choice for large spaces. GarageBand's own reverb works well for short vocal rooms.

Do I need plug-ins to get a good vocal?

No. GarageBand's built-in EQ, compressor and effects are enough. A preset can save setup time.

Keep learning

Back to the full guide: GarageBand vocals, from recording to mixing. Related: Is There Auto-Tune in GarageBand? Pitch Correction Explained and Best GarageBand Vocal Presets.