Alt + O S Mac Excel Shortcut: Legacy Cell Style (2026 Guide)

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Quick Answer

To do Alt + O S on Mac in Excel, install Accelerator Keys, then press Option, then O, then S. It runs the Excel 2003 command Format > Style. The modern ribbon shortcut is Alt + H + J.

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If you are looking for the Alt + O S shortcut on Mac Excel, you may know it from Excel 2003, where Alt + O opened the Format menu. Windows Excel still accepts these menu keys. With Accelerator Keys, they work on your Mac too.

What Does Alt + O S Do?

Alt + O + S is the legacy shortcut for Format > Style. It opens the Style dialog. You apply a named cell style, or change a style so that all the cells that use it change together.

Legacy vs. Modern Shortcut Comparison

Shortcut Era Menu Path
Alt + O + S Legacy (Excel 2003) Format > Style
Alt + H + J Modern (Ribbon) Home > Cell Styles

Both shortcuts work with Accelerator Keys.

How It Works on Mac

On your Mac, Accelerator Keys runs Format > Style in the Excel menu bar. It works on any ribbon tab and at any window width.

Step-by-Step: How to do Alt + O S on Mac Excel

  1. Install the Fix: Download Accelerator Keys (14-day free trial, no credit card required).
  2. Select the cells: Select the cells that get the style.
  3. Press Option: Press the Option key. It works like Alt on Windows.
  4. Press the letters one at a time: Press O, then S.
  5. Result: The Style dialog opens. Pick a style and click OK.

Frequently asked questions

Does Alt + O S work natively on Mac Excel?

No. Excel for Mac’s own KeyTips do not support the legacy Alt + E, Alt + I, Alt + O, and Alt + D menu keys. Accelerator Keys adds them. Press Option, then O, then S.

What is the modern equivalent of Alt + O S?

The modern ribbon shortcut is Alt + H + J (Home > Cell Styles). Both work on Mac with Accelerator Keys.

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