This problem is not specifically related to iTunes version 12.4.3, but has been appearing since 12.3.3 far as I can remember. I also had it on OS X 10.11.4 and 10.11.5.
Older video cards. For with iTunes 12.1, Apple bundled 64-bit versions of Apple Mobile Device Support and Apple Application Support with iTunes. For iTunes 12.1 through 12.4.3.1, Apple also offered a version for 64-bit Windows computers with older video cards, which keep the 32-bit versions of said libraries. Go to finder, press: Command + Shift + G. In the dialog box paste: /Music/iTunes. If you keep it on a separate hard drive, I can’t help you find it. A copy of iTunes 10.7 dmg file ( download directly from Apple ). A copy of iTunes 12 dmg file (preferably the same version that is installed on your computer). All users running an old OS X 10.11.3 version can navigate to App Store Software Update option for latest updates directly from Apple. If you want to perform manual OS X 10.11.4 installation on multiple Mac computers/laptops through Bootable USB or Bootable DVD using iTunes, then Download OS X 10.11.4 Without App Store via Direct Links.
All my podcasts from a particular site no longer download.
I have many other podcasts (from other sources) which have no download issues at all.
4 Download.ir
It seems iTunes on my Mac has problems dealing with HTTP/1.1 redirects (302) for podcasts; I get the little round circle with exclamation mark in front of the podcast, and when i click on it :
I decided to launch Wireshark to see what was happening, and came to the conclusion iTunes seems to have a issues with a redirect it gets from the website.
The HTTP/1.1 request from iTunes asks to
which yields an empty page. The server responds with a 302 redirect to
Itunes 10.11.4 Download For Mac
which is the working podcast indeed. Moreover, when I open that URL in iTunes (File > Open Stream) it works also. Yet despite this working URL, iTunes does not seem to be able to download / play the podcast though the redirect.
Not even directly from iTunes Store:
It happens for all podcasts of that company, which seems to have redirected all its podcasts from rf.proxycast.org to media.radiofrance-podcast.net
So my guess is that my iTunes has trouble dealing with this redirect. Unless it is something else, but I don't know what.
I tried accessing the podcast from another device (PC) and the podcast is all fine.
Reinstalled iTunes, recreated the iTunes .xml file, no change.
Unsubscribe, delete, resubscribe. Tried many things. Nothing helps.
Any ideas about where to look?
Here is the Wireshark TCP stream:
Os X 10.11.4 Or Later
EDIT : the podcast URL is http://radiofrance-podcast.net/podcast09/rss_16256.xml