Flash is the standard for engaging PC experiences – 99% of PCs worldwide have Flash Player installed and 85% of the top 100 websites use Flash. Approximately 75% of online videos are viewed and 70% of web games are delivered using Adobe Flash technology.
You can Uninstall Flash Player on Mac OS X by following the simple steps in this up-to-date guide for uninstalling Flash Player Mac.
Flash is known to cause numerous issues, it is a battery drain, slows down your Mac, uses lots of memory, and eats up lots of CPU time.
If you’re fed up of it, you can completely remove it using the below guide.
Uninstall Flash Player Mac Guide
Remove Adobe Flash Player on Mac OS X 10.6 and later

Download the Adobe Flash Player uninstaller:
Mac OS X, version 10.6 and later: uninstall_flash_player_osx.dmg (Adobe hosted file)
Remove Adobe Flash Player on Mac OS X 10.5 and earlier
Mac OS X, version 10.4 and 10.5: uninstall_flash_player_osx.dmg (Adobe hosted file)
Open the downloaded .dmg file, and open the Uninstaller app. You will see this screen:

Click Uninstall. Make sure all your browsers are closed. Quit your browser (Chrome, Firefox, Opera, Safari).
On completion, you can quit the Uninstaller.
After the uninstall, also carry out these steps:
Adobe Flash Player For Mac Dmg File
Remove these folders manually:
These folders are both within your Home folder ~ you can access directly or use Go To Folder by pressing Command+Shift+G.
It is also recommended that you reboot your Mac after the uninstall to clear any remaining caches and fully complete the removal.
Why You Should Uninstall Flash from your Mac
2015 is the year you should be removing Flash from your Mac. It’s now disabled by default in Firefox, one of the most popular web browsers. This is mainly because of security concerns. Adobe is quite slow to release security fixes, making Flash one of the biggest security holes on a lot of computers.
Since Flash is still very popular and used on a lot of websites, it is a hard decision to completely remove it. But here’s why you should:
- Flash uses a ton of CPU and memory resources, taking this away from your other apps.
- Ever noticed how your Mac runs extra hot when running Flash content? That’s because it’s very CPU/GPU intensive when compared to HTML5 video.
- Removing Flash will improve the security of your Mac.
- Many sites now use HTML5 video instead of Flash, so they don’t even use Flash at all.
- Some large sites and large companies are starting to abandon Flash in 2015. Amazon is moving away from Flash for their advertising.
When I download the current Adobe flash player installer from the Adobe website using Safari 6.0.1 under OSX 10.8.2, I end up with a file named 'install_flash_player_osx.dmg.mdlp'
in my downloads folder. I am curious as to why the .mdlp extension is being added to the disk image containing the flash player installer, which has always terminated with the .dmg extension in the past.
The only program which uses the .mdlp extension that I am aware of is matlab; matlab is installed on this machine and it is the program the OS would like to use to open the file. I have not seen OSX, or any component thereof, replace or append file extensions in the past and I am able to download .dmg files from other websites without this phenomenon occurring.
Note that I am not interested in suggestions regarding the opening of the file, but rather an explanation as to why the .mdlp extension is being applied in the first place, whether it be by the local machine or Adobe.
slhck4 Answers
To fix this, just rename the file to not have the .mdlp extension, i.e. it ends in .dmg. Then, do get info on the .dmg file and change the 'open with' to diskimagemounter, which should now be on the list of choices.
I did the following fix
- Use 'Get info' on the file from Finder.
- Rename the file so it ends with .dmg only.
- Change the 'open with' to diskimagemounter.
- Rename the file so that it ends with .dmg.mdlp again.Then it should work for all files...
Seems like it is an Adobe problem and not an OS X one. The 'fix' is simply to remove the .mdlp extension from the file name as others have said.
From MacIssues:
Adobe distributes flash using a file management routine that appends the extension “.mdlp” to the file being downloaded. This routine is somewhat similar to the routine that Apple uses with Safari, where you will see the extension “.download” associated with files as they download.

For some reason, at times Adobe’s services will not change this appended extension before the file is handed off to your browser for downloading, so when Safari saves the file it will further append “.download” and then remove only this extension when done, resulting in the downloaded file being left with .mdlp as the final extension.
Adobe Flash Player Mac Firefox
I'm experiencing the same issue, although not being able to solve it with the fix provided above. Instead, I directly try to open the .mdlp-file with another program, i.e., Open With -> Other, then locating DiskImageMounter under SystemLibraryCoreServices, also making sure to check the box so that DiskImageMounter becomes default. Tada!
Adobe Flash Player
protected by Community♦Jan 7 '15 at 10:08
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