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Sonnet Technologies logo 1999

Sonnet Technologies is a manufacturer of Thunderbolt docks, external GPUs, and rackmount systems for professional users.


The company was founded in 1986 in Irvine, California, making upgrade cards for Macintosh computers, which often featured distinctive purple heatsinks.[1] Sonnet marketed some accelerator cards originally designed at DayStar Digital, which had gone out of business.[2]


  1. Sonnet Info by Craig, 6400 Zone. 2005-05-01.
  2. PowerPC Upgrades for 68040 Macs with LC PDS by Daniel Knight, Low End Mac. 2016-09-01.

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