Script Debugger can open any of AppleScript’s native file types. These are the modern file formats, compatible with Panther (Mac OS X 10.3) and later. They are:

• Compiled script file with the bytecode in the data fork. This is the standard modern format created by the current version of Apple’s AppleScript Editor.

• Script bundle. The compiled script file (with the bytecode in the data fork) is inside the bundle.

• Applet bundle. This is the standard modern applet format.

Script Debugger can save in any of the above formats as well.

Script Debugger can also open a file in any of the older historical script formats. It doesn’t save in these older formats, so to save such a file, you’ll need to select one of the modern formats. The older formats include:

• Compiled script file with the bytecode in the resource fork. This is the oldest format, going back as far as AppleScript itself.

• Nonbundle applet. Script Debugger can open nonbundle applets created on any system, including a “Classic applet” (Mac OS 9 and earlier).

Script Debugger can also open a text file. The file is assumed to be UTF-8 unless there is a BOM (byte order mark) indicating otherwise; if there’s an encoding error, the file is assumed to be in the old MacRoman encoding. Line endings can be Mac or Unix.