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Fix PowerPoint for Mac Changing Trebuchet Font to Bold Italic
Question details
The user needs a solution for an issue where Trebuchet fonts are missing standard variations and default exclusively to bold italic in Office for Mac applications.
- Product
- Microsoft PowerPoint and Word for Mac
- Device & OS
- macOS
- Scenario
- Formatting presentation slides or documents where standard variations of the Trebuchet font are required but unavailable.
- Observed behavior
- The Trebuchet font lacks an arrow for variations in the font list, and text is automatically changed to bold italic in Microsoft PowerPoint and Word, even though it displays correctly in Adobe applications.
Make sure all Microsoft Office applications are completely closed before managing or validating your system fonts, as the apps need to refresh their font cache upon the next launch.
Validate and Restore Fonts via macOS Font Book
Use the built-in macOS Font Book utility to resolve duplicated or damaged font files that cause Office applications to misread the font family.
Microsoft Office for Mac relies heavily on the macOS system Font Book. If a standard font file (like Trebuchet Regular) becomes corrupted, duplicated, or disabled, PowerPoint will automatically default to the next available variation, such as bold italic.
Open Launchpad on your Mac, search for 'Font Book', and launch the application.
Type 'Trebuchet' in the top search bar to locate the font family and expand it to view all installed variations.
If you see a yellow warning icon indicating duplicate fonts, right-click the font family and select 'Resolve Duplicates'.
Select the Trebuchet fonts, click 'File' from the top menu bar, and choose 'Validate Font'. If the standard font is reported as damaged, you will need to delete and reinstall a fresh copy of the font.
Restart your Mac, open PowerPoint, and check the font dropdown list to see if the regular Trebuchet option has been restored.
Check for Microsoft Office Updates
Updating PowerPoint ensures that you have the latest bug fixes related to font mapping and compatibility on newer macOS versions.
Submit Feedback to Microsoft
If standard troubleshooting fails, the issue may be a known software bug requiring a patch from Microsoft.
Try WPS Office for Mac for Seamless Document Creation
If you are continuously dealing with font rendering bugs and formatting issues in Microsoft Office for Mac, consider switching to WPS Office. It provides a fast, lightweight, and highly compatible workspace for presentations, spreadsheets, and documents.
- 1. Download WPS Office: Visit the official WPS website to download the free installation package for macOS.
- 2. Install the Application: Open the downloaded file and drag the WPS Office icon to your Applications folder.
- 3. Open Your Presentation: Launch WPS Presentation and open your existing .pptx files to enjoy accurate text formatting and font variations.
Frequently Asked Questions
Why does Trebuchet only show as 'Bold Italic' in PowerPoint for Mac?
This usually happens when the standard (regular) Trebuchet font file is damaged, missing, or duplicated in the macOS Font Book. PowerPoint detects only the remaining valid variation, which in this case is bold italic, and forces it as the default.
Does this font issue affect other Microsoft Office applications?
Yes. Microsoft Word and Excel for Mac share the same font mapping and caching mechanisms. If a font is restricted or behaving erratically in PowerPoint, it will likely exhibit the exact same behavior in Word.
Why does the font work correctly in Adobe apps but not in Office?
Adobe applications handle typography differently and often use their own independent font caches or integrate with Adobe Fonts. Microsoft Office for Mac relies strictly on the macOS system Font Book and its own internal mapping system, making it more sensitive to duplicate or unvalidated system fonts.
