Acorn

Acorn

· v8.6.2 Free

Acorn is a new image editor built with one goal in mind - simplicity. Fast, easy, and fluid, Acorn provides the options you'll need ....

 System Requirements
  • Intel, 64-bit processor
  • macOS 14.0 or later

Description

Acorn is a new image editor built with one goal in mind – simplicity. Fast, easy, and fluid, Acorn provides the options you’ll need without any overhead. Acorn feels right, and won’t drain your bank account.

 

• Take

screenshots

using Acorn and edit them right away.

• Chain together image filters to create stunning effects.

• Layer based image editing, an industry standard.

• Make new images and layers using your built-in iSight.

• Easy image and canvas resizing, just by changing the

size

of your window.

• Take advantage of every pixel of your monitor with full screen image editing.

• Tablet sensitive for pressure strokes and using the tablet’s eraser.

• Vector shape and text layers.

• Freeform, elliptical, rectangular, and magic wand selections.

• Gradients.

• Create and apply custom text styles.

• Control opacity and blending modes for each layer.

• Write plugins using the Python scripting language, as well as in Objective-C.

• GPU powered. The same graphics card that makes your gaming experience smooth, helps Acorn fly through the toughest of graphics operations.

WHAT’S NEW

Version 8.6.2:

New Stuff

• The `acorn` shell tool now has a `-screenshot` argument which tells Acorn to take a layered

screenshot

of all your open windows. You can pass the `-delay` argument with a number of seconds to wait before taking the

screenshot

, and you can also pass the `-appname` argument to only include windows from the named app.

• Running `acorn -h` will give a full list of available options.

• Acorn’s Dock menu now has an option to take a layered

screenshot

. This is pretty handy because you can have all your windows exactly how you want them, and then control click on Acorn in the Dock to take your

screenshot

without any windows losing focus.

Changes

• Filter presets previously didn’t respect the canvas selection on bitmap layers when they were being used. We’ve changed it so filters are now masked to the selection.

• When exporting as PSD images, Acorn doesn’t add any e

✓ Checked against source material

Editor-checked details

Editor: macv.net Editorial Team · Last reviewed: 2026-08-06
Apple SiliconM1 / M2 / M3 / M4
Intel MacCompatible
Why we recommend it

It suits Mac-only individuals/developers needing lightweight layered retouching, screenshot annotation, social graphics, simple vector/text design and scriptable batch output without a large subscription. Use read-only Sources, layered ACORN master, Fonts/Plugins/Scripts, exchange PSD/TIFF/PDF, Web Exports and Archive. Dry-run automation on 3–5 duplicates, write to a new folder and validate count, dimensions, alpha, ICC and names. Choose Photoshop for standard PSD collaboration, complex prepress and maximum plug-ins; Affinity Photo for deeper photo/design compositing; Pixelmator Pro for native Mac templates/ML design; Photomator for Apple Photos/batch RAW; Paint X for basic drawing. Validate the new brush on old Intel GPU, PQ/XDR and third-party Image Unit workflows with small files first.

Pros

  • One-time purchase with no ongoing subscription and a lighter interface than large pro suites. .acorn retains layers, text, shapes, selections, grids and filters. The Metal brush plus Smudge/Clone/Burn/Dodge is responsive. Pixel, vector, path text, shape processors, nondestructive filters, masks, RAW, 32-bit PSD, deep TIFF and web formats share one app. Select Subject, Remove Background and Super Resolution process locally without uploading images. Data Merge, Smart Layer Export, JavaScript/AppleScript, Automator and acorncli suit repeated production. PSD shadow exchange and SVG import keep improving. Layered PSD/TIFF and multiple bit depths aid delivery. The direct build offers a 14-day trial and less restricted automation.

Cons

  • macOS 14+ only; older Macs require a legacy build. .acorn is proprietary and other apps cannot preserve all layers/filters. PSD support is explicitly “best effort,” so smart objects, adjustment layers, text, blends and complex effects need layer inspection. RAW depends on macOS and new camera compression may await system updates. There is no Lightroom/Capture One-style Catalog, keywords, tethering or team DAM, nor Photoshop/Affinity’s huge plug-in, tutorial and prepress ecosystem. SVG omits bitmaps, filters and masks. App Store sandboxing restricts some automation. Fresh ML use needs model download. The Metal brush still requires attention on old Intel GPUs. Powerful scripts can overwrite many files, so use duplicates, dry runs and separate output folders.

Installation steps

  1. Acorn 8.6.1 requires macOS 14 Sonoma or later and is a universal Intel/Apple silicon binary; Apple silicon runs natively and Metal is the default renderer. Large layered ACORN, 32/64/128-bit TIFF, RAW and multi-filter jobs benefit from 16 GB+ RAM and ample SSD. Direct and Mac App Store builds differ in licensing/sandboxing: verify the direct build when AppleScript, Automator, JavaScript or acorncli matters, because some automation is restricted in the store build. Test copied samples with the new Metal brush, Smudge, Clone, Burn, Dodge, selections, RAW import, PQ/Display P3, 32-bit PSD, layered PSD/TIFF, SVG/PDF, JPEG XL/WebP and transparent PNG. Select Subject, Remove Background and Super Resolution download local ML models on first use; retest offline afterward. Always save a layered .acorn master before production editing instead of overwriting the only JPEG/PNG.

Uninstallation steps

  1. Before uninstalling, Save As a fresh .acorn milestone for every critical document; it is the preferred format that fully retains Acorn layers, grids, text, shapes, selections and filter settings. Also export layered PSD/TIFF for interchange, flattened PNG/TIFF for durable viewing and PDF/SVG for vector delivery, reopening each to inspect text, masks, filters, shadows, profile, depth and alpha. SVG is pure vector: bitmap operations, filters and masks are ignored, so it is not a complete backup. Archive source RAW, font names/licenses, third-party Image Units, JavaScript/AppleScript, Command Bar scripts, export presets, brushes and ML model state. Record automation input, output and version. Copy to a second medium and test offline. Uninstall through the purchase channel; do not remove Application Support/Containers/script folders before user content is exported. Autosave and macOS Versions are recovery, not independent versioning.

Common errors and fixes

  1. Brush fails inside selections, old Intel GPU issues or CPU Memory backing: confirm 8.6.1, restore default Metal/IOSurface settings and restart. If hidden Renderer/Backing controls were exposed, do not use CPU Memory backing with the new brush engine. PQ/HDR is blinding on XDR: 8.6.1 converts affected images to Display P3; still inspect histogram/profile and define SDR/HDR delivery rather than judging brightness alone. RAW failure/color differences: Acorn relies on macOS native Camera RAW, so update macOS and verify camera/compression; preserve RAW and test a DNG copy. PSD changes: layered 32-bit PSD is opened “to the best of its ability”; smart objects, adjustment layers, text, filters and blends are not fully compatible. Keep .acorn authoritative. If ML appears inactive, complete first model download and retest offline; processing is local. Missing Image Unit: enable third-party plug-ins, restart and check architecture/signing. SVG omits bitmap layers, masks and filters by design. For lag/artifacts, isolate plug-ins and old Intel GPU with a small document and retain a system report.

What changed in this version

  1. Acorn 8.6 rewrites the brush engine with Metal shaders and moves Smudge, Clone, Burn and Dodge to it. Velocity Thinning makes faster strokes thinner; linear interpolation improves color blending; Brush Designer retains test strokes while the last stroke updates live. Crop gains Keep Aspect Ratio and Option-Return focuses layer renaming. AppleScript do JavaScript now returns values; acorncli accepts JavaScript stdin/stdout and a broader API, while JavaScript automation can be disabled. ML models are no longer bundled: Super Resolution, Select/Mask Subject and Remove Background download them on first use, but image processing remains local. Version 8.6.1 fixes the new brush with canvas selections, certain older Intel GPUs and CPU Memory backing, and corrects PQ-profile images that appeared excessively bright on the new XDR display by converting them to Display P3.

Alternatives

Screenshots

Acorn 截图