Last Resort font displays the same glyph for many different Unicode characters. Using this one-glyph-per-block generalization allows the Unicode Last Resort font to contain a glyph for every character in Unicode despite the fact that the total number of Unicode characters exceeds the address space of an sfnt (TrueType and OpenType) font structure, which has a 16-bit glyph index that can store a maximum of 65,536 glyphs. Unicode now has over 100,000 defined characters, with a potential address space of over one million characters—over 15 times the sfnt size limit. Unicode Last Resort Font will therefore not break as Unicode continues to grow and the Basic Multilingual Plane (BMP) and surrogate planes fill up further. Apple's Last Resort font Apple's Last Resort font is a system font for the Macintosh operating systems that is identical to the Unicode Last Resort font (which was created for the Unicode consortium by Apple). Apple's Last Resort font was first included in Mac OS 8.5 in 1998, for the benefit of applications using Apple Type Services for Unicode Imaging (ATSUI). It is also used in macOS. In 2001, for Mac OS X 10.1 the Last Resort font design was revised to include the border text and was re-digitized, and extended by Michael Everson of Evertype, who continues to update it with each new release of Unicode. Unicode Consortium versions Since version 13.000, the font family is released under SIL Open Font License 1.1. The family includes Last Resort, Last Resort High-Efficiency. Last Resort High-Efficiency uses Format 13 (Many-to-one range mappings) 'cmap' (character to glyph index mapping) table, which reduces the size of the font, but may not be compatible with some environments. Releases 13.000 (2020-10-08): Supports Unicode Version 13.0.0. Only Format 13 cmap table is included. 13.001 (2020-10-22): Added Last Resort High-Efficiency. Both fonts include Format 4 cmap table, with Last Resort includes Format 12 cmap table and LRHE includes Format 13 cmap table. 14.000 (2021-12-01): Supports Unicode Version 14.0.0. Added 12 glyphs for 12 new blocks. Modified 2 glyphs in 2 existing blocks (Ahom, Tangut Supplement). 15.000 (2022-09-13): Supports Unicode Version 15.0.0. 'meta' table was removed. Added 7 glyphs for 7 new blocks. Modified 6 glyphs in 6 existing blocks (Egyptian Hieroglyph Format Controls, Number Forms, Mathematicl Operators Supplement, Variation Selectors, CJK Unified Ideographs Extension F, Variation Selectors Supplement). GNU Unifont The GNU Unifont is a font that contains a glyph for every