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I’m reopening this thread because I discovered that asking Siri will turn on bold text. However, it only worked on a few Safari pages or website like Bing. This issue occurred on my MacBook Pro 14-inch M4 Pro with macOS Tahoe 26.2 public release. Is this a bug?

Screenshot 2025-12-14 at 12.24.41 AM.png
 
I’m reopening this thread because I discovered that asking Siri will turn on bold text. However, it only worked on a few Safari pages or website like Bing. This issue occurred on my MacBook Pro 14-inch M4 Pro with macOS Tahoe 26.2 public release. Is this a bug?
Will you please make an experiment? Open ~/Library/Preferences/, sort by date modified and turn off Bold Text. What plist is modified?
 
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