A colleague used uploadify to upload pictures, but the client is chrome on MAC system and can't upload pictures. After half an hour of searching, it was found that the reason was that the browser did not open the flash setting.
Mac system to open flash settings steps:
Enter in the URL: chrome://settings/search#flash
In Content, click Content Settings,
Find flash, allow websites to run flash
Re-open the website to upload the image. Perfect setup. Halfway through, I opened the chrome://plugins/ plug-in in WINDOWS mode, and an error was reported in the mac. The page at chrome://plugins/ may be temporarily unavailable, or it may be permanently moved to a new URL