If you're sure you've installed the latest version of Flash, take each of the following steps that you haven't already tried. After each step, relaunch Safari and test.
1. If you're getting a "blocked plug-in" error, triple-click the line below to select it:
/Library/Internet Plug-Ins
Right-click or
control-click the highlighted text and select
Services ▹ Open
from the contextual menu. A folder should open. If there is more than one item in the folder with the words "Flash Player" (not "flashplayer") in the name, open the respective Info windows, check the version numbers, and delete all except the latest. You may be prompted for your login password. If you get the same error after doing that, re-download and reinstall Flash. Download it from this page:
Never download a Flash update from anywhere else.
2. If you get a "
missing plug-in" error, select
Safari
▹
Preferences...
▹
Security
from the Safari menu bar and check the box marked
Enable plug-ins.
3. Select
Safari ▹ Preferences... ▹ Extensions
from the Safari menu bar. If any extensions are installed, disable them.
4. In the Safari preference window, select
Privacy ▹ Remove All Website Data
Close the window. Then select
▹ System Preferences… ▹ Flash Player ▹ Advanced
and click Delete All. Close the preference pane.
