Adobe Photoshop is the name most people associate with professional image editing. It remains the safest choice for advanced retouching, compositing, client compatibility, plug-ins, tutorials, and workflows connected to Lightroom, Illustrator, InDesign, and the rest of Creative Cloud.

Mac users now have unusually strong alternatives. Affinity combines professional pixel editing, vector design, and page layout in one free app. Pixelmator Pro offers a more approachable Mac-native experience with powerful automatic editing tools and a one-time purchase. GIMP is the long-running free and open-source option with deep customization and cross-platform support.

This comparison looks at all four as Mac image editors: layers, retouching, RAW support, design tools, AI features, file compatibility, learning curve, platform support, and current US pricing.

Quick Verdict

Choose Adobe Photoshop if your work depends on the industry-standard editing environment, reliable PSD handoffs, mature automation and plug-ins, advanced compositing, or Adobe's wider creative ecosystem.

Choose Affinity if you want the strongest free alternative for serious photo editing and also need vector and page-layout tools in the same desktop app.

Choose Pixelmator Pro if you want a polished Mac-first editor that is easier to learn, integrates well with Apple hardware and Photos, and is available as a reasonably priced one-time purchase.

Choose GIMP if you want a completely free, open-source, cross-platform editor and are willing to accept a less Mac-native interface and a more technical workflow.

Feature Comparison

Adobe Photoshop

Adobe Photoshop remains the reference point because it handles almost every kind of raster image job. Photographers use it for detailed retouching and composites. Designers use it for campaign assets, mockups, textures, and graphics. Illustrators paint with it, production teams automate it, and clients often assume layered source files will arrive as PSDs.

Its depth is the main advantage. Selections, masks, adjustment layers, blend modes, Smart Objects, typography, color management, Camera Raw, actions, scripts, brushes, and third-party plug-ins have been refined across decades. Adobe has also pushed Firefly features directly into the workflow, making generative fill, expansion, object removal, and other AI-assisted edits accessible without leaving the document.

Photoshop is the least risky choice when files move among agencies, freelancers, printers, and clients. Other apps can read and write PSD files, but a document that relies on newer Smart Objects, proprietary effects, specific fonts, or unusual blend behavior may not round-trip perfectly. If preserving a complex client's file is more important than saving money, use the native application.

The larger Adobe ecosystem matters too. Photoshop pairs naturally with Lightroom and Lightroom Classic for photo organization, Illustrator for vector artwork, InDesign for page layout, After Effects for motion, and Creative Cloud libraries for shared assets. That breadth is difficult for any single alternative to reproduce.

The downside is recurring cost and complexity. Adobe's current US pricing page lists the standalone Photoshop plan at $22.99 per month on an annual contract billed monthly. More interestingly for photographers, the Photography plan is $19.99 per month on the same billing structure and includes Photoshop, Lightroom, Lightroom Classic, and 1TB of cloud storage. Check both plans before subscribing rather than assuming the single-app plan is the best value.

Choose Photoshop if editing images is paid professional work, collaborators expect Adobe files, or its specialized tools save enough time to justify a continuing subscription.

Affinity

Affinity changed significantly after Canva acquired its developer. The former Affinity Photo, Designer, and Publisher products have been rebuilt as one application with Pixel, Vector, and Layout studios. The core Mac and Windows app is now free, while optional Canva premium services provide additional AI-powered features.

That makes Affinity the value leader in this comparison. Pixel tools cover layered photo editing, RAW development, masks, live filters, retouching, compositing, batch work, and color adjustments. Without opening another application, you can switch to vector illustration or build a multipage layout. A freelancer creating photos, logos, brochures, social graphics, and print materials may be able to complete far more of the job inside one app than with Photoshop alone.

Affinity also emphasizes nondestructive editing and real-time performance. Its live filters, adjustment layers, masks, and GPU-accelerated previews make experimentation practical without permanently changing the source image. The app supports common professional formats, including PSD, PDF, SVG, TIFF, and Adobe-oriented interchange formats.

Compatibility still needs realistic expectations. Affinity can exchange PSD files, but it is not Photoshop. Before replacing Adobe in a client workflow, open representative production documents, inspect fonts and effects, export them again, and ask the recipient to verify the result. The same caution applies to any alternative editor.

The unified app is also broader than some users need. A photographer who only wants quick color adjustments may find three creative disciplines in one interface excessive. Teams already standardized on Adobe may save subscription money but spend it again in retraining and file-conversion checks.

Choose Affinity if you want the most capable no-cost Mac creative app, especially when your work crosses photo editing, vector graphics, and print or page design.

Pixelmator Pro

Pixelmator Pro is the most Mac-like editor in this group. Its interface is cleaner than Photoshop or GIMP, it uses familiar macOS conventions, and Apple now develops the app as part of its creative software lineup.

The app is broad enough for more than basic photo fixes. It includes nondestructive layers, masks, color adjustments, retouching, painting, typography, vector shapes, illustration tools, effects, templates, and video layers. It can work with PSD, SVG, PDF, Adobe Illustrator, and EPS files, and Apple says it supports more than 750 RAW formats.

Pixelmator Pro is especially effective when you want a polished result quickly. Automatic background removal creates an editable mask, Super Resolution enlarges images while enhancing detail, and machine-learning-assisted adjustments reduce repetitive work. Integration with Photos lets you use Pixelmator Pro's editing tools while working with your photo library.

The application is less overwhelming than Photoshop, which is a real advantage for bloggers, marketers, developers, small businesses, and independent creators who make web graphics, app screenshots, thumbnails, product images, and occasional photo composites. It starts faster conceptually because fewer professional subsystems compete for attention.

Its limitations appear in specialized production. Photoshop has a much larger plug-in, automation, training, and enterprise ecosystem. Affinity provides deeper vector and page-layout work in the same free app. GIMP can be modified and scripted without depending on a commercial vendor. Pixelmator Pro is strongest when the workflow stays personal, Mac-centered, and relatively self-contained.

Apple currently sells Pixelmator Pro for Mac on the App Store for $49.99 as a one-time purchase. It is also included in Apple Creator Studio for $12.99 per month or $129 per year after the trial. The subscription is more compelling if you also need Final Cut Pro, Logic Pro, Motion, Compressor, or MainStage; otherwise, the one-time Mac purchase is simpler.

Choose Pixelmator Pro if you want the best balance of capability, approachability, and native Mac design.

GIMP

GIMP is the only open-source application in this comparison. The project describes it as a free, cross-platform image editor for macOS, Windows, Linux, and other operating systems, with source code that users can inspect, modify, and redistribute.

The editor provides layers, masks, channels, paths, selections, blend modes, painting tools, transformations, filters, color adjustments, text, and extensive customization. Plug-ins, scripts, brushes, and configurable panels make it flexible for users willing to shape the application around their workflow.

GIMP is valuable for students, occasional editors, open-source teams, technical users, and organizations that need image editing on several operating systems without license fees. It is also a useful fallback to keep installed when you need to inspect or convert an image on a machine without commercial creative software.

The tradeoff is polish and workflow familiarity. GIMP does not feel as native on macOS as Pixelmator Pro, and users trained in Photoshop may find familiar concepts placed behind different terminology or interactions. PSD support is useful but should not be treated as perfect compatibility for complex documents. RAW processing also commonly involves a separate compatible processor rather than one integrated catalog and development system.

The current official Mac download is GIMP 3.2.4, released in April 2026, with separate Apple silicon and Intel installers. The project supports macOS 11 Big Sur or later and warns that it does not currently publish an official package through Apple's Mac App Store.

Choose GIMP if open source, cross-platform availability, extensibility, and zero cost matter more than native Mac refinement or Adobe workflow compatibility.

Which One Should You Use?

Use Adobe Photoshop if you retouch commercial photography, create complex composites, exchange layered files with clients, rely on specialist plug-ins, or already work inside Creative Cloud.

Use Affinity if you are a freelancer, designer, or small business that needs serious pixel, vector, and layout tools without paying for several creative applications.

Use Pixelmator Pro if you make blog graphics, thumbnails, marketing images, app assets, illustrations, product photos, or personal creative work primarily on Apple devices.

Use GIMP if you prioritize open-source software, work across Mac, Windows, and Linux, need extensive customization, or cannot justify any software cost.

Before migrating an established workflow, test the files that actually matter. Open a layered PSD with Smart Objects, masks, type, effects, and linked assets in the alternative you are considering. Export it, reopen it in Photoshop if collaborators use Adobe, and inspect the result. File compatibility is more important than a checklist when unfinished work has to move between applications.

Final Verdict

Adobe Photoshop is still the best overall choice for professional compatibility and depth. It has the strongest ecosystem, the safest PSD workflow, mature production tools, and the broadest role in commercial creative teams. The subscription is its defining disadvantage.

Affinity is the best free Photoshop alternative for serious creative work. Combining pixel editing, vector design, and page layout in one no-cost Mac app gives it exceptional value, provided your workflow does not demand exact Adobe compatibility.

Pixelmator Pro is the best choice for most independent Mac users. It is powerful without feeling unnecessarily complex, integrates tightly with Apple's ecosystem, and its $49.99 one-time price is easy to justify for regular image work.

GIMP is the best open-source option. It remains capable, customizable, and genuinely cross-platform, but it asks users to tolerate more workflow friction than the commercial Mac-focused apps.

My practical recommendation:

• Subscribe to Photoshop when compatibility, advanced tools, or paid client work makes it the low-risk option.
• Start with Affinity when you need maximum creative capability for no software cost.
• Buy Pixelmator Pro when you want a friendly, fast, long-term image editor for your Mac.
• Install GIMP when open source, scripting, or multi-platform access is a priority.

Note: Features and US prices are current as of June 2026. Plans, bundled features, AI allowances, system requirements, and file-format support can change. Verify the latest details on each developer's official product, pricing, or download page before purchasing or changing a production workflow.