Can't install latest flash player MacOS Sierra GM

[dialabrain]

The title says it all. Can't install version 23.* Tried uninstalling also before install with no luck.

Any Thoughts?

TIA

[ridhij42083560]

Which browser are you using? What is the issue you are facing?

Thanks!

[dialabrain]

I use Firefox 48.02 most of the time. I also use Chrome 53.0.2785.101 and Safari 10.0 . The issue is the installer fails with the error "Installation Failure" with no browser open.

[dialabrain · Accepted solution]

FWIW, I got Flash to install using this link.

https://fpdownload.macromedia.com/pub/flashplayer/latest/help/install_flash_player_osx.dmg

[mferreira85]

Hello,

The problem you are not able to install Adoble Flash PLayer on macOS Sierra is because of SIP (System Integrity Protection) which is preventing the app to write on the directory /var/folders/...

To solve this you have to enter Recovery Mode of Mac. To do that, restart your mac and press Command + r to enter on recovery mode. After loaded recovery mode, go to the menu and select terminal. On terminal enter the following command line:

csrutil disbale

After that, enter reboot to enter normal initialization. Now you will be able to install Flash Player. When finished installation, do the same procedure to enter recovery mode and enable again the SIP:

csrutil enable and then reboot

[dialabrain]

FWIW, I ready marked this as solved but, why would you have to disable SIP to install flash when one never had to do that in any beta or point release version of El Capitan with SIP enabled nor most of the dev seeds of macOS? And why did it work with the installer I linked above?

[ridhij42083560]

Hi,

You can get the latest Flash Player from Adobe Flash Player Install for all versions ​. The issue has been fixed.

Thanks!

[dialabrain]

You're welcome.

[_maria_]

@dialabrain

Please upload the FlashPlayerInstallManager.log file saved at ~/Librarly/Logs to cloud.acrobat.com/send using the instructions at How to share a document and post the link to the uploaded file in your reply.

Thank you.

--

Maria

[dialabrain]

Maria, do you still want the install log even though I marked the thread as Correct and resolved the issue?

[_maria_]

Yes, please.

The issue was 'fixed' by replacing the online installer (which downloads and installs Flash Player silently in the background) with the offline/standalone installer.  The issue is that on some systems installation fails when the online installer is used.  We're still investigating this issue and the install log file will help in that effort.

Thank you.

[dialabrain]

Okay, here you are. Although it would have been easier just to attach it here.

Shared Files - Acrobat.com

[_maria_]

Thank you, dialabrain

I'd like to get some more information from you.  Please do the following:

1. Launch the Terminal app (located at /Applications/Utilities/Terminal.app)
2. At the prompt type: cd /var/folders/zz/zyxvpxvq6csfxvn_n0000000000000/ <enter>
3. At the prompt type: pwd <enter>
4. Confirm that you are in the directory from step 2
5. If you are type: ls -al <enter>
   1. that's lower-case L
6. Post a screenshot of the permissions, user, and group for the T folder.  For example:
   

Thank you.

[dialabrain]

[_maria_]

Thank you very much for additional information.

--

Maria

[dialabrain]

You're welcome.

[mferreira85]

Hello,

The other versions of Flash Worked fine without disable SIP but for some reason this new version did not work with SIP enabled on Sierra GM.

When i did this procedure i commented above, it worked fine to me and then i re-enabled SIP and it's all good now.