TextEdit


TextEdit is a simple, open-source word processor and text editor, first featured in NeXT's NeXTSTEP and OpenStep. It is now distributed with macOS since Apple Inc.'s acquisition of NeXT, and available as a GNUstep application for other Unix-like operating systems such as Linux. It is powered by Apple Advanced Typography and has many advanced typographic features.

Implementation

TextEdit replaced the text editor of previous Macintosh operating systems, SimpleText. TextEdit uses the Cocoa text system to read and write documents in Rich Text Format, Rich Text Format Directory, plain text, and HTML formats, and can open old SimpleText files. It also has access to the operating system's built-in spell-checking service. The version included in Mac OS X v10.3 added the ability to read and write documents in Word format, and the version in Mac OS X v10.4 added the ability to read and write Word XML documents. The version included in Mac OS X v10.5 added read and write support for Office Open XML and OpenDocument Text. The version included in Mac OS X v10.6 added automatic spelling correction, support for data detectors, and text transformations. The version included in Mac OS X v10.7 added versioning of files, and Autosave similar to iOS.
Formatted text, justification, and even the inclusion of graphics and other multimedia elements are supported by TextEdit, as well as the ability to read and write to different character encodings, including Unicode. TextEdit automatically adjusts letter spacing in addition to word spacing while justifying text. TextEdit does not support multiple columns of text.
The high-resolution TextEdit 1.5 icon found in Mac OS X versions starting with 10.5 features an extract from Apple's "Think different" ad campaign. This was replaced by a blank sheet of notebook paper in 10.10.