Helvetica compromises...the spacing has ended up much looser than Miedinger's wonderfully tight original at display sizes but much too tight for comfortable reading at text sizes." iOS used first Helvetica then Helvetica Neue as its system font. All releases of macOS prior to OS X Yosemite used Lucida Grande as the system font. The version of Helvetica Neue used as the system font in OS X 10.10 is specially optimised; Apple's intention is to provide a consistent experience for people who use both iOS and OS X. Apple replaced Helvetica Neue with San Francisco in iOS 9 and OS X El
Helvetica Nimbus Sans. This is an extremely large font family with optical sizes spaced for different sizes of text and other variants such as stencil styles. Florian Hardwig has described its display-oriented styles, with tight spacing, as more reminiscent of Helvetica as used in the 1970s from cold type than any official Helvetica digitisation. Monotype's Arial, created for IBM and also used by Microsoft, is indistinguishable by most non-specialists. Matthew Carter, who was a consultant for IBM during its design process, describes it as "a Helvetica clone, based ostensibly on their Grots 215 and 216" (Monotype's old 1920s sans-serif family, popular