San Francisco (sans-serif typeface) and iOS 10 is a new variant named "SF Compact Rounded". It is used in the new contact placeholder icons introduced in the OSes. The "SF Serif" variant was showcased during the keynote at WWDC 2018 on June 4, 2018 when the all-new Apple Books app was introduced. This variant is exclusive to Apple Books in iOS 12 and macOS Mojave, is not mentioned in Apple's Typography design guidelines, and is not publicly downloadable like other variants of the San Francisco typeface. Since its introduction, San Francisco has gradually replaced most of Apple's other typefaces on their software and hardware
Garamond period of Garamond's early life roman type had been displacing the blackletter or Gothic type which was used in some (although not all) early French printing. (Though his name was generally written as 'Garamont' in his lifetime, the spelling 'Garamond' became the most commonly used form after his death. Professor Hendrik Vervliet, the leading contemporary expert on French Renaissance printing, uses Garamont consistently.) The roman designs of Garamond which are his most imitated were based on a font cut around 1495 for the Venetian printer Aldus Manutius by engraver Francesco Griffo. This was first used in the book "De Aetna",