Skip to the card

Card 497 of 9982026-08-21 issue

Observed arrival · 2026-08-21

MacDisplay Turns an Old Mac Into a Second Screen

macdisplay.app Observed source
Editorial interest 83/100 Selection signal · not a rating of the site

MacDisplay uses Thunderbolt, Ethernet, or Wi-Fi to turn another Mac into an extended display, without extra hardware, an account, or cloud services.

Landing page captured for the 2026-08-21 issue.

Why it surfaced

This is a sharply defined answer to a familiar problem: the unused iMac or spare MacBook becomes useful again. The 10 MB app runs on macOS 11 or later, can be launched from a USB stick, and costs €29.99 plus VAT once rather than requiring a subscription.

MacDisplay uses Thunderbolt, Ethernet, or Wi-Fi to turn another Mac into an extended display, without extra hardware, an account, or cloud services.

Observed signals

Read the marks

Editorial observations of this landing page, not a rating.

○OpenPublic substance visible
$PaidCommerce or pricing visible
✦PrettyNotable craft visible
●ProPolished or operationally mature
◎NicheUnusually specific use

One card from the complete issue

The Missing Knob Bulletin

359,677 arrived 1,000 judged 998 catalogued Enter the complete issue
macdisplay.app

Landing page observed 2026-08-21. The live site may have changed.