PatternSpace

macOS · Display Calibration

macOS test pattern generator.
Native. Exact. Accurate.

PatternSpace renders hardware-accurate calibration patterns on the exact display you want to measure. The full pattern library and SDR reference output are free. Pro adds ColourSpace, CalMAN, and PGenerator automation plus advanced HDR — one purchase, no subscription.

Learn More Download on the App Store

v1.1 · macOS 15.6+ · Free on the Mac App Store · Pro $34.99 one-time

Generator
ColourSpace
CalMAN
PGenerator
PatternSpace
Output Display
Built-in Retina
3456×2234 · HDR
ColourSpace 192.168.1.42:20002
09:14:22 [ColourSpace] Connected from 192.168.1.42
09:14:24 [ColourSpace] Patch #1 received — 100% green
09:14:26 [ColourSpace] Patch #2 received — 50% red
09:14:28 [ColourSpace] Patch #3 received — D65 white
09:14:30 [ColourSpace] Patch #4 received — 18% gray

Why PatternSpace

Built for the
calibration professional

Every pixel matters in display calibration. PatternSpace is engineered from first principles for accuracy — a Metal EDR pipeline, colorimetric output presets, full HDR headroom, zero drift.

Metal EDR Pipeline

16-bit per channel rendering via rgba16Float CAMetalLayer. Full HDR headroom on Pro Display XDR and compatible monitors.

Multi-Monitor Support

Target any connected display. Automatic fallback when your calibration display disconnects. Per-display ICC profile diagnostics.

Preset Diagnostics Inspector

Live gamut, transfer function, encoding, EDR headroom, estimated peak luminance, and the active display profile — know exactly what you're measuring before you measure it.

Colorimetric Output Presets

Device Native, Display SDR, and 14 SDR reference presets — sRGB, Adobe RGB, BT.709/BT.1886, BT.2020, DCI-P3, and more. Pro adds HDR PQ, tone-mapped HDR, Display HDR, and Linear HDR.

PatternSpace Remote

A first-party WebSocket/JSON protocol with 4-digit pairing. Drive patches from your own scripts and tools — free to evaluate with 25 rendered patches per session, unlimited with Pro.

100+ Pattern Library

GPU-rendered patterns across 6 categories: Color, Checks, Geometry, Swatch, Gamma, and Clipping. PNG thumbnails for every pattern.

Calibration Protocols

Works with your
existing software

PatternSpace speaks the three most common professional calibration protocols, plus its own open PatternSpace Remote protocol — connect via any workflow you already use.

ColourSpace

Connect via ColourSpace's built-in Network Server. PatternSpace auto-discovers on the local network — no manual IP entry needed.

LightIllusion

CalMAN

Configure CalMAN's Unified Pattern Generator Control Interface (UPGCI) to connect. PatternSpace listens passively — just point CalMAN at your Mac's IP.

Portrait Displays

PGenerator

Full emulation of the PGenerator network protocol. Any software that supports PGenerator as a target will connect automatically via network discovery.

Full Emulation

PatternSpace Remote

The built-in WebSocket/JSON protocol for scripts and custom tools. Pair with a 4-digit code and render up to 25 patches per session free — Pro removes the limit. The protocol is openly documented.

Built-in · Open SDK

ColourSpace, CalMAN, and PGenerator automation are part of PatternSpace Pro. The PatternSpace Remote server is included free with an evaluation allowance.

Network Architecture
Calibration Software & Tools
ColourSpace · CalMAN · PGenerator · Remote
↓ Local Network · Auto-discovery
PatternSpace · macOS
Listening · Local network · Sandboxed
↓ GPU · vsync-locked · no drift
Output Display
Full-screen patch window · Above all apps
Color Depth
16-bit
HDR Headroom
Up to 16×
Wide Gamut
BT.2020
Measurement Range
Full · Legal

Pattern Library

100+ GPU-rendered patterns

Technical Specifications

Engineered for
measurement accuracy

Color Accuracy
Channel depthUp to 16-bit per channel
HDR headroomUp to 16× (Pro Display XDR)
Wide gamutBT.2020 · DCI-P3 · sRGB
Output presetsDevice Native · Display SDR · 14 SDR references · HDR
Measurement rangeFull / Legal
Peak White / EDRAdjustable per display (Pro)
Patch renderingGPU · vsync-locked · no drift
Display
SystemmacOS 15.6+ · Apple Silicon & Intel
Multi-monitorAny connected display — internal or external
Patch windowFull-screen · above all apps
Same-display modeMenu bar collapse + HUD overlay
Display sleepSuppressed during active session
Compatibility
ColourSpaceLightIllusion · Network Server
CalMANPortrait Displays · UPGCI
PGeneratorFull protocol emulation
PatternSpace RemoteWebSocket / JSON · open protocol
Local pattern library100+ GPU-rendered patterns
LanguagesEN · DE · ES · FR · IT
Security Profile
App Sandbox — fully sandboxed macOS app
Local network only — traffic is limited to calibration protocols on your LAN
No analytics, no telemetry — nothing is ever sent to the internet
Camera & microphone — no access
Location & Bluetooth — no access
File system — read-only, user-selected files only
Pattern Categories
Color
Checks
Geometry
Swatch
Gamma
Clipping

Pricing

Free to measure.
Pro to automate.

PatternSpace
Free
  • Full pattern library — 100+ patterns across Color, Checks, Geometry, Swatch, Gamma, and Clipping
  • Device Native, Display SDR, and all 14 SDR reference presets
  • Full & Legal measurement range
  • Preset Diagnostics Inspector and display/profile details
  • PatternSpace Remote evaluation — pair a client and render up to 25 patches per session
Download on the App Store
PatternSpace Pro
$34.99 one-time purchase
  • Everything in Free
  • ColourSpace, CalMAN & PGenerator network automation — calibration software drives patterns directly
  • Unlimited PatternSpace Remote rendering
  • Advanced HDR output — HDR PQ, system-tone-mapped HDR, Display HDR, and Linear HDR presets
  • Peak White and EDR control for HDR measurement
Download on the App Store

Pro is a single in-app purchase — no subscription — and can be shared with Family Sharing. US price shown; regional pricing set by the App Store.

FAQ

Answers for
calibration workflows

PatternSpace is designed for display calibrators, reviewers, video engineers, and home theater installers who need predictable pattern output from a Mac.

What is PatternSpace?

PatternSpace is a macOS test pattern generator for display calibration. It renders precise SDR and HDR patches, pattern grids, clipping checks, gamma tools, and color swatches on the display you choose.

Does it work with ColourSpace, CalMAN, and PGenerator?

Yes. PatternSpace Pro supports network automation from ColourSpace, CalMAN, and PGenerator. It also includes PatternSpace Remote, an open WebSocket JSON-RPC protocol for scripts and custom controllers.

What is included in the free download?

The free Mac App Store download includes the full pattern library, Device Native and Display SDR output, 14 SDR reference presets, full and legal ranges, and a Remote evaluation allowance.

When do I need PatternSpace Pro?

Pro unlocks ColourSpace, CalMAN, and PGenerator automation, unlimited PatternSpace Remote rendering, advanced HDR output presets, Peak White control, and EDR controls for HDR measurement.

Buying Guides

Compare PatternSpace
before you buy

Short guides for calibrators evaluating a Mac-native pattern generator against hardware and Raspberry Pi workflows.

Hardware Generator
PatternSpace vs Portrait Displays G1

Compare native macOS rendering with a dedicated Calman-focused HDMI pattern generator.

Raspberry Pi Utility
PatternSpace vs pgen_client

Compare a Mac App Store calibration app with an advanced-user Raspberry Pi pattern workflow.

Open Protocol · SDK

Build your own
PatternSpace controller

PatternSpace Remote is an openly documented WebSocket/JSON-RPC protocol. Pair with a 4-digit code, list patterns and displays, and render patches from any language that can open a WebSocket — Python, Node, Swift, shell scripts.

PatternSpaceSDK on GitHub
# Connect — discovered via Bonjour (_patternspace._tcp)
ws://your-mac.local:7878/patternspace
Authorization: Bearer <pairing-code>
 
# Render a 10-bit red patch (JSON-RPC 2.0)
{"jsonrpc": "2.0", "id": 1,
 "method": "pattern.displayColor",
 "params": {"r": 1.0, "g": 0.0, "b": 0.0, "bitDepth": 10}}
PatternSpace

The professional's
patch generator.

Built for calibrators, display reviewers, video engineers, and home theater installers. Precise patches, native macOS, zero compromise.

Download on the App Store Contact Us

Version 1.1 · macOS 15.6 or later · Free on the Mac App Store