PatternSpace and Portrait Displays G1 solve different versions of the same calibration problem. PatternSpace turns a Mac into a native pattern renderer for local and network-driven workflows. G1 is a dedicated hardware pattern generator designed around Calman workflows.
Quick Recommendation
Choose PatternSpace when your measured display is connected to a Mac, when you need a large built-in pattern library, or when you want ColourSpace, CalMAN, PGenerator, and open JSON-RPC automation from one app. Choose G1 when your workflow specifically calls for a dedicated external HDMI pattern generator for Calman.
Workflow Fit
- PatternSpace: Native macOS app, Mac App Store distribution, free SDR library, one-time Pro upgrade for automation and advanced HDR output.
- G1: Dedicated external hardware generator advertised by Portrait Displays as pairing with Calman licenses.
- Best overlap: Both can fit professional display calibration; the practical choice depends on whether the Mac itself should render the patch or an external box should feed the display.
Automation
PatternSpace Pro supports ColourSpace, CalMAN, PGenerator emulation, and the first-party PatternSpace Remote WebSocket JSON-RPC protocol. G1 is presented by Portrait Displays as a Calman-oriented hardware generator, so it is strongest when Calman is the center of the bench.
Cost and Setup
PatternSpace starts as a free Mac App Store download and unlocks Pro with a one-time in-app purchase. Portrait's public G1 product pages position it as dedicated hardware with a separate hardware purchase. If your Mac is already in the signal chain, PatternSpace is the lower friction starting point.
Sources
G1 positioning and pricing should be checked on Portrait Displays and the Portrait store before buying, because hardware bundles and prices can change.