I have been in contact with my host provider, and their response is "we are not compatible with Safari".  So now I have to go find a host provider that is compatible with Safari.  The one you are using seems to be; can  you tell me which provider you are using?

The demo works.  I'll check back with my host site.

I put up an HTML5 download test, and it works with Safari. 

http://jcisaacs.com/TEST/HTML5-Test/HTM … 0Demo.html

Also, I just updated to Safari 13.  Still has the problem; download button not working.

I have been using 1.5.1.  I just sent a link to a smaller site that didn't have photos that I didn't want going public.

Here is one I generated today:

http://justoncephoto.com/PHOTOS/190917- … -FOOD-WEB/

Same problem. 

I'm not sure what to look for in the htaccess files.  I don't see anything related to Mod_Security.

From what I've read, Safari should support HTML5 download.

I contacted my hosting service.  They tried white listing my IP in Mod_Security, but that did not solve the problem.

I did another check, and found a possible culprit.  I am using Mac OS 10.13.6 High Sierra, and found that the download button is not working, as described in the previous post, when using Safari as the browser.  However, when I use Firefox or Chrome, the download button does work.

I am having the same problem.  My web server is running PHP Version 7.3.9.  The download button is downloading an html file named juicebox.php.html.  It has this content:

<head><title>Not Acceptable!</title></head><body><h1>Not Acceptable!</h1><p>An appropriate representation of the requested resource could not be found on this server. This error was generated by Mod_Security.</p></body></html>

Here is a link to a juicebox PRO site.

http://jcisaacs.com/PHOTOS/180304-Horse-WEB/

I checked the config file; it is generating a blank linkURL for each image.  I tried deleting that field entirely, did not solve the problem.