Andrewishere wrote:
• Hi my MacBook running High Sierra suddenly stopped playing any videos on any browser or quicktime- I just get the circular egg timer. Tried everything I can think of:
checked enable javascript
• deleted all cache website history and website data
• obviously rebooted a number of times
• deleted extensions/plug ins
Tried to refresh
Flash but see it has been retired.
Any help appreciated
Try an alternative browsers...
Uninstall all third party apps that are Cleaners/Optimizers/VPN/Anti-Virus
To trouble shoot further you can:
—Try a SafeBoot https://support.apple.com/en-us/HT201262
Takes noticeable longer to get to the login screen, does a 5 minute disk repair before it fully boots up, and certain system caches get cleared and rebuilt, including dynamic loader cache, etc.
Login and test. Reboot as normal. Caches get rebuilt automatically.
In Safe mode third party system modifications and system accelerations are disabled, it removes malware, etc hampering smooth operation, however a reboot will put it back to normal mode.
This test will tell you if third party interference; extensions etc are not loaded in safe boot mode.
—Test issue in another user (or guest user) account https://support.apple.com/guide/mac-help/set-up-other-users-on-your-mac-mtusr001/mac
This will tell you if it a universal issue or isolated to your user/admin account.