Guitar Amp Software for Mac: 8 Checked, 1 Unsigned Installer
Most lists of guitar amp software for Mac rank tone. The failures I found this morning had nothing to do with tone. The free Neural Amp Modeler build that most tutorials link to is an unsigned installer that Gatekeeper rejects. The current GarageBand won't install on anything older than macOS 15.6. And one of the most popular single-input interfaces puts the guitar jack on a channel that some amp apps can't read.
I don't own a guitar or an interface. What I do have is an M4 Mac mini on macOS 26.4.1 with no Rosetta installed, so any Intel-only binary fails outright instead of quietly running under translation. On 2026-10-27 I downloaded the installers I could get without an account, opened them without installing, and ran Apple's auval validator on the Audio Unit plug-ins. For the paid suites I read each vendor's own requirements page. This post covers both, and I mark which is which.
The free options, measured
GarageBand is the free starting point. Its Amp Designer and Pedalboard plug-ins come with it. The App Store lookup for the US store on 2026-10-27 lists version 10.4.14 (released 2026-04-22), a 0.73 GB download, and a minimum of macOS 15.6. If your Mac is stuck on Sonoma, the store won't give you the current build. Logic Pro 12.4 has the same amp plug-ins, costs $199.99 and needs macOS 15.4.
Neural Amp Modeler (NAM) is the free, open-source option that loads captured profiles of real amps. Here is the trap. The GitHub releases page shows v0.7.15 at the top, but v0.7.14 and v0.7.15 (both 2026-06-02) have no files attached. The last release with a Mac installer is v0.7.13 from 2024-12-21. I downloaded it and checked it:
$ pkgutil --check-signature "NeuralAmpModeler Installer.pkg"
Status: no signature
$ spctl -a -vv -t install "NeuralAmpModeler Installer.pkg"
NeuralAmpModeler Installer.pkg: rejected
source=no usable signatureThe binaries inside are fine. All three (the standalone app, the AU and the VST3) are universal x86_64 + arm64. The installer itself is unsigned, so macOS blocks it on a double-click. The project README now points to "Gateway", a pre-built fork from the same author, distributed as Google Drive links on neuralampmodeler.com/users. Gateway 1.0.1 (changelog dated 06/02/2026) is a 9.3 MB disk image. It's signed by Atkinson Advanced Modeling, LLC, it passes notarization, and its app, AU and VST3 are universal with a macOS 10.15 floor. If a tutorial sends you to the GitHub page, get Gateway instead.
ToneLib GFX is often listed as free. It isn't. The download page offers a 30-day trial of version 4.9.0, and the full license is $89.95 ($44.98 in a Halloween sale as of 2026-10-27). The 257 MB installer is notarized, and all four formats (app, AU, VST, VST3) are universal. One mismatch: the bundles' Info.plist files claim macOS 10.11 (app) and 10.13 (plug-ins), but vtool shows the binaries were built for macOS 11.0. Go by the binaries.
Both AUs passed validation. I copied each component to ~/Library/Audio/Plug-Ins/Components, ran auval -v, then deleted the copies:
| Audio Unit | Result | Cold open | Warm open | Warning |
|---|---|---|---|---|
| Gateway 1.0.1 (aufx 72RG AAMa) | AU VALIDATION SUCCEEDED | 2.6 ms | 0.02 ms | Preset name not retained |
| ToneLib GFX 4.9.0 (aufx Tlfx Gdwn) | AU VALIDATION SUCCEEDED | 210.3 ms | 103.6 ms | Implements MIDI events but is type aufx |
Neither warning stopped validation. Passing auval on a Mac without Rosetta means the arm64 code path loaded. It doesn't prove the plug-in sounds right, because I had no audio going through it.
The paid suites, from vendor pages
None of these let me download a trial without an account, so the rows below are what each vendor publishes, read on 2026-10-27. I didn't run any of them.
| Product | Price | Try first | Mac formats | Stated macOS / licensing |
|---|---|---|---|---|
| BIAS X | $149 ($99 upgrade) | Not listed | AU, VST3, AAX | macOS 11.7, Apple Silicon recommended. Online activation required, no offline activation, 5 computers |
| Helix Stadium Native | $399.99 ($99.99 from Helix Native) | Free Intro tier + 15-day full trial | VST3, AU, AAX | Line 6 account, 4 computers. The download link redirects to a login page |
| Neural DSP Archetype: Gojira X | €129 on the store shown to me | 14 days | VST2, VST3, AU, AAX, standalone | "Native Apple Silicon". iLok account required |
| Guitar Rig 7 Pro | Not read | Not read | Standalone, VST3, AU, AAX | macOS 13, 14 or 15. Apple Silicon "via Rosetta 2 & natively on ARM in Stand-alone or in hosts that support it" |
Two gaps. Native Instruments' live site answered every request from this Mac with HTTP 429, so the Guitar Rig row comes from the Internet Archive's 2026-04-12 copy of the spec page. That copy lists no macOS 26 support. IK Multimedia's site returned 429 even for its home page, so AmpliTube 5 isn't in the table. I wasn't going to fill that row from a reseller summary.
The licensing column matters more on a Mac than it looks. BIAS X says outright that it has no offline activation. Neural DSP needs iLok. If the Mac you play on is often offline, or you've already used up an iLok seat, check that before the trial ends.
The input 1 trap
This one is about hardware and software together. NAM's standalone app takes mono input from the interface's input 1 only. Issue #157 (24 comments) was opened by a Scarlett Solo 3rd Gen owner who couldn't select input 2, which is where that model's guitar jack is. In October 2025 an Apogee Element 46 owner on a Mac Studio running macOS 26.0.1 reported the same thing. A maintainer wrote in March 2025 that the app wrapper "needs a bigger overhaul for multichannel support", and the pull request that would fix it (#556) is still open. The issue was closed as completed on 2026-05-03 with no linked fix. Inside a DAW you route the input yourself and none of this applies. It only bites in the standalone app, which is how most people start.
Focusrite's own guides show the layout changed between generations:
Focusrite knows about the problem. Its article on combining inputs 1 and 2 says "some apps have a limitation which means they only accept Input 1" and adds a toggle in Focusrite Control 2 for the 4th Gen Solo and 2i2 that folds both inputs together. If you're buying for guitar on a Mac, that's a reason to skip a used 3rd Gen Solo.
As an Amazon Associate I earn from qualifying purchases. On 2026-10-27, with a New York 10001 delivery address, the Scarlett Solo 4th Gen was $159.99, shipped by Amazon. The Scarlett 2i2 4th Gen was $224.99 and gives you two instrument-capable inputs if you also want a mic. Focusrite's 2i2 manual says macOS needs no driver. Bus power and drivers for 19 interfaces are in audio interface for Mac.
Other complaints worth knowing
NAM's tracker has two more open Mac issues. #152: the AU doesn't show up in GarageBand, first reported on an M1 under Monterey and again in January 2025 on Intel with macOS 15.2 and NAM 0.7.13. #305: models and IRs stored in iCloud Drive don't load, which the maintainer reproduced. Keep your .nam files in a local folder.
"Supports Mac" and "native on Mac" used to be different claims. On Line 6's forum, owners complained that Helix Native under Rosetta made renders crawl until version 3.15, and a 2022 Mac Studio owner's DAW hard-crashed whenever the plug-in loaded. Guitar Rig 7's spec page still makes native support depend on the host, so run its trial in your own DAW before paying.
Trying several of these leaves installer receipts behind, and pkgutil --forget removes the receipt, not the files. "Bad CPU type in executable" from an old plug-in is the Rosetta gap I hit in Arduino IDE on Apple silicon.
FAQ
What is the best free guitar amp software for Mac?
GarageBand's Amp Designer and Pedalboard are free and built in, but the current GarageBand 10.4.14 needs macOS 15.6. Neural Amp Modeler is free, open source and native on Apple silicon. Use its signed "Gateway" build from neuralampmodeler.com, because the last installer on GitHub (v0.7.13) is unsigned and Gatekeeper rejects it. ToneLib GFX is a 30-day trial, not free.
Does guitar amp software run natively on Apple silicon Macs?
Most current options do. Neural Amp Modeler Gateway 1.0.1 and ToneLib GFX 4.9.0 ship universal arm64 and x86_64 binaries and pass Apple's auval validator on an M4 Mac without Rosetta. BIAS X and Neural DSP say they're native. Guitar Rig 7's spec page says it runs natively in standalone mode or in hosts that support it, and through Rosetta 2 otherwise.
Why doesn't my guitar show up in Neural Amp Modeler on Mac?
NAM's standalone app reads mono input from input 1 only (GitHub issue #157). On a Scarlett Solo 3rd Gen the guitar jack is input 2, so the app hears nothing. Load NAM as a plug-in in a DAW and route input 2 to it, or use an interface with the guitar on input 1, such as the Scarlett Solo 4th Gen. The 4th Gen Solo and 2i2 can also combine both inputs in Focusrite Control 2.
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How I checked this: on 2026-10-27 I downloaded the NAM v0.7.13 disk image from GitHub, the NAM Gateway 1.0.1 image from the Google Drive link on neuralampmodeler.com, and the ToneLib GFX 4.9.0 package from tonelib.net. I opened them on an M4 Mac mini (macOS 26.4.1, no Rosetta) without installing, using pkgutil --expand-full, lipo, vtool, pkgutil --check-signature and spctl. I validated the two Audio Units with auval -v from a temporary user-level copy and deleted it afterwards. No guitar, interface or audio signal was involved, so nothing here says how any of these sound. GarageBand and Logic Pro figures come from Apple's App Store lookup API. Paid-suite rows come from the vendors' pages linked above (Guitar Rig from an Internet Archive copy). Interface input layouts come from Focusrite's help center API, and owner reports come from the NAM GitHub tracker and Line 6's forum. Amazon prices were read from the product pages with a New York 10001 delivery address.