Microsoft Excel 4 for Mac template file
File type: Spreadsheet and workbook file
The sls4 file extension identifies a template created by Microsoft Excel 4 for Mac.
An sls4 file belongs to the spreadsheet and workbook file category and stores reusable spreadsheet content and formatting.
File type category:
Spreadsheet and workbook file
Date updated: September 27, 2026
Microsoft Excel is a spreadsheet application used to create formatted worksheets, graphs, and other spreadsheet content. An sls4 file is a template file associated specifically with Microsoft Excel 4 for Mac.
The template can contain a reusable worksheet design, including its formatting and spreadsheet content. It was intended to provide a starting point for creating spreadsheets in that version of Excel.
The sls4 format is a legacy Macintosh format and is no longer commonly used. Other Excel template files use the xlt extension, while the Office Open XML template format introduced with Microsoft Office 2007 uses the xltx extension. Microsoft Excel for Windows and Microsoft Office for Mac are associated with Excel files, but current versions may not support this old format directly.
Open an sls4 file with Microsoft Excel if the installed version supports the Excel 4 for Mac format. The original Microsoft Excel 4 for Mac is the most appropriate software for direct access, although it is obsolete.
Current Microsoft Excel for Windows or Microsoft Office for Mac may not recognize the file. If the file does not open, an older compatible Excel installation or a copy of the original Mac environment may be required.
Software applications that handle other tasks involving sls4 files:
Microsoft Windows
Apple macOS / Mac OS X
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