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# 37.2. `MacOS` — Access to Mac OS interpreter features

This module provides access to MacOS specific functionality in the Python interpreter, such as how the interpreter eventloop functions and the like. Use with care.

Nota

This module has been removed in Python 3.x.

Note the capitalization of the module name; this is a historical artifact.

`MacOS.``runtimemodel`

  Always `'macho'`, from Python 2.4 on. In earlier versions of Python the value could also be `'ppc'` for the classic Mac OS 8 runtime model or `'carbon'` for the Mac OS 9 runtime model.

`MacOS.``linkmodel`

  The way the interpreter has been linked. As extension modules may be incompatible between linking models, packages could use this information to give more decent error messages. The value is one of `'static'` for a statically linked Python, `'framework'` for Python in a Mac OS X framework, `'shared'` for Python in a standard Unix shared library. Older Pythons could also have the value `'cfm'` for Mac OS 9-compatible Python.

exception `MacOS.``Error`

  This exception is raised on MacOS generated errors, either from functions in this module or from other mac-specific modules like the toolbox interfaces. The arguments are the integer error code (the `OSErr` value) and a textual description of the error code. Symbolic names for all known error codes are defined in the standard module `macerrors`.

`MacOS.``GetErrorString`(errno)

  Return the textual description of MacOS error code errno.

`MacOS.``DebugStr`(message[, object])

  On Mac OS X the string is simply printed to stderr (on older Mac OS systems more elaborate functionality was available), but it provides a convenient location to attach a breakpoint in a low-level debugger like gdb.

  Nota

  Not available in 64-bit mode.

`MacOS.``SysBeep`()

  Ring the bell.

  Nota

  Not available in 64-bit mode.

`MacOS.``GetTicks`()

  Get the number of clock ticks (1/60th of a second) since system boot.

`MacOS.``GetCreatorAndType`(file)

  Return the file creator and file type as two four-character strings. The file parameter can be a pathname or an `FSSpec` or `FSRef` object.

  Nota

  It is not possible to use an `FSSpec` in 64-bit mode.

`MacOS.``SetCreatorAndType`(file, creator, type)

  Set the file creator and file type. The file parameter can be a pathname or an `FSSpec` or `FSRef` object. creator and type must be four character strings.

  Nota

  It is not possible to use an `FSSpec` in 64-bit mode.

`MacOS.``openrf`(name[, mode])

  Open the resource fork of a file. Arguments are the same as for the built-in function `open()`. The object returned has file-like semantics, but it is not a Python file object, so there may be subtle differences.

`MacOS.``WMAvailable`()

  Checks whether the current process has access to the window manager. The method will return `False` if the window manager is not available, for instance when running on Mac OS X Server or when logged in via ssh, or when the current interpreter is not running from a fullblown application bundle. A script runs from an application bundle either when it has been started with pythonw instead of python or when running as an applet.

`MacOS.``splash`([resourceid])

  Opens a splash screen by resource id. Use resourceid `0` to close the splash screen.

  Nota

  Not available in 64-bit mode.