您可以使用/usr/bin/openOSX实用程序：
NAME
open -- open files and directories
SYNOPSIS
open [-e] [-t] [-f] [-F] [-W] [-R] [-n] [-g] [-h] [-b bundle_identifier] [-a application] file ... [--args arg1 ...]
DESCRIPTION
The open command opens a file (or a directory or URL), just as if you had double-clicked the file's icon. If no application name is specified, the default application as deter-
mined via LaunchServices is used to open the specified files.
If the file is in the form of a URL, the file will be opened as a URL.
You can specify one or more file names (or pathnames), which are interpreted relative to the shell or Terminal window's current working directory. For example, the following com-
mand would open all Word files in the current working directory:
open *.doc
Opened applications inherit environment variables just as if you had launched the application directly through its full path. This behavior was also present in Tiger.
您还应该使用subprocess模块而不是os.system，因为避免转义问题更加容易：
import subprocess
subprocess.call(['open', '-a', 'TextEdit', file])
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