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Question: Safari will not open finder to upload files. Flash, Java, and Silverlight based sites.

There are a handful of sites I use that use Silverlight, Flash, and Java to open files. The sites work fine but when I try to upload images to the sites servers finder does not open. This started to happen after the High Sierra and Safari Version 11.0.1 (13604.3.5) update. The Flash/Java sites work fine in Chrome and Firefox but I have to use Parallels and IE to upload files in the silverlight based site. Any ideas? Here is an example of the silverlight site I use for digital signage. When I hit add new images it used to open finder and let me upload images.User uploaded file

MacBook Pro

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Nov 18, 2017 2:33 PM in response to Piercey1126 In response to Piercey1126

Try setting up another admin user account to see if the same problem continues. If Back-to-My Mac is selected in System Preferences, the Guest account will not work. The intent is to see if it is specific to one account or a system wide problem. This account can be deleted later.


Isolating an issue by using another user account


If the problem is still there, try booting into the Safe Mode using your normal account. Disconnect all peripherals except those needed for the test. Shut down the computer and then power it back up after waiting 10 seconds. Immediately after hearing the startup chime, hold down the shift key and continue to hold it until the gray Apple icon and a progress bar appear. The boot up is significantly slower than normal. This will reset some caches, forces a directory check, and disables all startup and login items, among other things. When you reboot normally, the initial reboot may be slower than normal. If the system operates normally, there may be 3rd party applications which are causing a problem. Try deleting/disabling the third party applications after a restart by using the application un-installer or by using the developer’s uninstall instructions. For each disable/delete, you will need to restart if you don't do them all at once.



Safe Mode - About El Capitan
also Sierra


Safe Mode Startup – El Capitan. also Sierra


If it works in the Safe Mode, try running this program when booted normally and then copy and paste the output in a reply. The program was created by Etresoft, a frequent contributor. Please use copy and paste as screen shots can be hard to read. On the screen with Options, please open Options and check the bottom 2 boxes before running. Click “Share Report” button in the toolbar, select “Copy to Clipboard” and then paste into a reply. This will show what is running on your computer. No personal information is shown.

Etrecheck – System Information

Nov 18, 2017 2:33 PM

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Question: Safari will not open finder to upload files. Flash, Java, and Silverlight based sites.