Apple Type Services for Unicode Imaging
| Developer(s) | Apple Computer |
|---|---|
| Operating system | OS X |
| Type | System Utility |
| License | Proprietary |
| Website |
developer.apple.com/ internationalization |
The Apple Type Services for Unicode Imaging (ATSUI) is the set of services for rendering Unicode-encoded text starting with Mac OS 8.5 and in OS X.
It replaced the WorldScript engine for legacy encodings.
Obsolescence
ATSUI was replaced by a faster[1] and modern Unicode imaging engine called Core Text in OS X 10.5 (Leopard).
The framework was officially deprecated with Xcode 4.6, which was released in December 2012: "Source code using ATS APIs will generate warnings while being compiled. For 10.8, there will be no loss of functionality but there could be areas where performance will suffer. Programmers are instructed to replace all their ATS code (including ATSUI) with CoreText as ATS functionality will be completely removed in future releases of OS X."[2]