Blue question mark icon in Safari on Mac

Assuming you, are someone else who uses that computer hasn't disabled image display, as Carolyn suggested, then it's usually a simple issue. Either the image is missing on the server the page is being displayed from, they've changed the image or its name, but the web page is still looking for the old item, or the image cached on your end is damaged.

That it's only happening on certain sites suggests the problem is on their end.

This fix worked for me:

-Safari menu

-Develop

-User Agent

-switch to FoxFire. (My browser was set to default at “Automatically Chosen”.)

(This issue was NOT caused by extensions. Hope this works for you too.)

Hi,

If you see Develop between Bookmarks and Window in your Safari menu bar click Develop then click uncheck Disable Images.

If you do not have the Develop menu enabled, you may have a third party Safari extension or third party plugin installed that's causing a conflict.

From the Safari menu bar click Safari > Preferences then select the Extensions tab. Uninstall one extension then quit and relaunch Safari to test.

If it's not an extensions issue, try troubleshooting third party plug-ins.

Back to Safari > Preferences. This time select the Security tab. Deselect: Allow plug-ins. Quit and relaunch Safari to test.

If that made a difference, instructions for troubleshooting plugins here.

This is a certification error in which safari erroneously believes that the url links to some images are fraudulent links. Follow these instructions to fix the problem: http://apple.stackexchange.com/questions/259559/safari-cant-open-the-page-persis tent-certificates-problem-in-safari/259609#259609

Safari - Unsupported third-party add-ons may cause Safari to unexpectedly quit or have performance issues

Safari doesn't load a page or webpage items are missing

Web Content not responding