Firefox required me to update Flash Player to version 18.104.22.168 (I had 22.214.171.124). I downloaded the installer, ran it, it downloaded the new version, began installing, then told me "Installation failed. Click FINISH for further as..."
I tried all the things it suggested without success. The instructions say to be sure Firefox/Tools/Add-ons/Plugins/Shockwave Flash says “Always activate,” but I can’t because Firefox has blocked it; it says “Never activate” and the other options are grayed out.
I deleted Applications/Adobe/Flash Player. I deleted Library/Internet Plug-ins/Flash Player.plugin and flashplayer.xpt. I think the old Flash is gone gone gone, but still I can't install the new version.
One of the forum responses said that the installer has a problem and gave a work-around, using the contents of the package, but the description of what to do didn't match what I saw as the contents of the package. When I double-clicked the .dmg, double-clicked the icon on the desktop, right-clicked the icon in the window that opened, clicked Show Package Contents, clicked Contents, click MacOS, and double-clicked Install Adobe Flash Player, the same error occurred. Still failed. A Terminal window opened, showing this:
Last login: Tue Mar 21 14:29:55 on console
Lap-Five:~ carhu$ /Volumes/Adobe\ Flash\ Player\ Installer/Install\ Adobe\ Flash\ Player.app/Contents/MacOS/Install\ Adobe\ Flash\ Player ; exit;
2017-03-21 14:45:57.982 Adobe Flash Player Install Manager[563:12111] Install failed with error code: 30.
...copying shared history...
...saving history...truncating history files...
At last there was an error code (30). Oh boy! Can some expert explain this and tell me what to do?
Rebooting the computer doesn't help. Re-downloading the installer doesn't help. I get the same error with AdobeFlashPlayer_25au_a_install.dmg (downloaded 10 days ago) and AdobeFlashPlayer_25_a_install.dmg (downloaded today).
Thank you for the detailed information. Error 30 is a known bug reproducible only in the online installer. This bug will be fixed in an upcoming release of Flash Player. In the interim, please use the offline installer posted at the bottom of the Installation problems | Flash Player | Mac page, in the 'Still having problems' section.
That fixed it, thank you. Unfortunately there's no Correct to click.
<moderator: Deleted personal information>
Thank you for confirming.