Switcher (2004): how Andy Hertzfeld built the Mac's first app switcher
Spotted 2026-11-13 13:07 (UTC+8) · original event 1984-10 · sources: Hacker News, folklore.org · spreading on 1 platformHeat score
Rank score: 8540% — where it sits on the charts
Discussion score: 6040% — how much people are talking about it
Cross-platform score: 3020% — how many platforms it spread to
Composite heat score:64.0rank × 0.4 + discussion × 0.4 + cross-platform × 0.2
Why it matters
In 1984 the Mac could only run one application at a time; switching meant quitting and relaunching, which made the computer feel slow even when the hardware was fast.The angle
A 20-hour hack born from watching a DOS utility at a magazine demo - and how Bill Gates tried to buy it for $40k before Steve Jobs bundled it with every 512K MacSuggested format: Short video · for Developers, Mac/Apple history followersEvidence chain
• HN #2, 51 pts/9 cmt (2026-11-13)• folklore.org story (written 2004, events Oct 1984-Jan 1985): Andy Hertzfeld saw DOS utility Memory Shift at a Byte demo on 1984-10-11, built a Mac app-switcher prototype in a 20-hour sprint• Bill Gates tried to hire him to build it for Microsoft (offered $40k), Hertzfeld refused to sell• demoed to Steve Jobs Jan 1985, Apple bundled Switcher with the 512K Mac• 2026-11-13 14:07 update: HN #4, 71 pts/14 cmt• 2026-11-13 15:07 update: HN #6, 81 pts/20 cmt• 2026-11-13 16:07 update: HN #8, 87 pts/23 cmt• 2026-11-13 17:07 update: HN #9, 92 pts/23 cmt