
Windows format TrueType fonts are accepted on MacOS X systems without any problem (Windows TrueType fonts are data fork-based), but resource fork-based MacOS TrueType format fonts are not useable on Windows systems. At Adobe, we most strongly recommend that our users license any new fonts in the OpenType format for cross-platform compatibility plus the large of number of typographical features and character sets that such fonts often provide. In terms of whether a font needs to be “converted” from one format to another, OpenType fonts are fully cross-platform compatible and no conversions are necessary. Such converted font software may be used only for your own customary internal business or personal use and may not be distributed or transferred for any purpose, except in accordance with Section 4.4 of this agreement. Use of the font software you have converted will be pursuant to all the terms and conditions of this agreement. In the case of fonts licensed by Adobe Systems Incorporated, the EULA does permit such conversions per section 14.7.4 which reads as follows:ġ4.7.4 You may convert and install the font software into another format for use in other environments, subject to the following conditions: A computer on which the converted font software is used or installed will be considered as one of your Permitted Number of Computers.

Actually to be more precise, conversion of a font from one format to another depends upon the font vendor and the EULA (End User License Agreement) associated with such fonts.
