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Question: SAFARI 12 UPDATE

Updated to Safari 12, 9/17. Now, I am unable to view videos via Netflix, Hulu, Amazon Prime. Reason? Silverlight is not recognized with the update. Please provide a solution. Thank you.

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I had to allow safari 12 to use the adobe flash player again. I opened up safari, clicked safari tab, preferences, websites and allowed access. Worked for me as well as let me use the legacy adblock plus in the extensions tab.

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Sep 23, 2018 10:16 AM in response to Fernando_Romo In response to Fernando_Romo

There are many posts about this, but to sum it up, if you have a 2011 or earlier Mac that does not have a Sandy Bridge CPU, it does not have hardware h.264 decoding built-in, so Safari's HTML5 implementation will not work. Chrome & Firefox use software decoding, and are limited to 720p. Apple blocked plugins in Safari 12, which is why Silverlight doesn't work. At this time, there is no way to get Netflix, etc. working in Safari, at all. Unlikely there will be a "fix" with Silverlight reaching end of life, and Apple moving forward and not looking back as they always do.

Sep 23, 2018 10:16 AM

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Sep 23, 2018 3:13 PM in response to EdwardAKramer In response to EdwardAKramer

This makes sense. Thank you. All my Macs which are pre 2011 cannot run Amazon Prime Video after upgrading to Safari 12 all my other Macs 2013 to present can. BTW Amazon tech support doesn't have a clue what the problem is.


Firefox 62.0.2 is streaming fine on all Macs.

Sep 23, 2018 3:13 PM

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Sep 25, 2018 4:34 AM in response to William Kucharski In response to William Kucharski

Last bullet point and I had to look up what an NAPAI was. That also didn’t describe what would happen to older machines.

If they had said “discontinues support of Silverlight” I would have avoided the update on the one machine I own that can’t handle HTML5 (ironically the one machine I use as a home entertainment system).

I am now on day 4 of creating a Time Machine back-up of another machine so I can use that to back-grade my safari on my mid 2010 Mac mini (a machine I chose for my home entertainment system because it had a built in DVD player).

Sep 25, 2018 4:34 AM

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Sep 25, 2018 5:11 AM in response to Jeremy Dunham In response to Jeremy Dunham

Silverlight is one of several NPAPI plugins that are no longer supported, and Apple can't list each and every one that used to work.


Note that though Safari can't support 1080p H.264 decoding, both Chrome and Firefox support HTML5 decoding in software, albeit at a maximum resolution of 720p.

Sep 25, 2018 5:11 AM

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Sep 25, 2018 6:28 AM in response to William Kucharski In response to William Kucharski

It isn’t that hard to state that “NPAPI plug-ins support streaming services on machines prior to 2011 which may experience difficulties. For a partial list of effected plug-ins please click here.“
They do, typically, list specific release information in a support article (which I DID read, but contained no information about NPAPI plug-ins [listed as security threats]).
Regardless of their verbiage forcing users to move away from Apple software with no easy way of downgrading to correct the mistake is not a direction I would lead a company which normally prides it’s self on backward compatibility (notable exceptions being OS9, PowerPC, and 32bit architecture which were all VERY clearly communicated ahead of time).

Having said that I really should have been making Time Machine back-ups of ALL my machines to avoid this type of problem (day 5 with 10 hours left) and turn off auto-update on my oldest computers.
Apple developers face a lot of challenges, especially where security is concerned, and problems like this may seem mundane to them. They are not mundane to end users who have been told that Apple products “Just work” “automatically” or children expecting to watch a program for school.

Sep 25, 2018 6:28 AM

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Sep 25, 2018 8:59 AM in response to Jeremy Dunham In response to Jeremy Dunham

Agreed 100% William. It wouldn't have been hard for Apple to make a better statement, considering the large consequences - not just with Netflix & Amazon streaming not working on older machines, but there are threads about medical software not working and other professional services that are greatly affected. Silverlight is not a small plugin (and who knew it was even a plugin vs extension before v12?), so it really should have been mentioned.


Furthermore, an Apple Senior Advisor didn't even know what the problem was, so how is Joe Public supposed to have a clue? That's proof there should have been more communication - even internally.

Sep 25, 2018 8:59 AM

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Sep 27, 2018 7:28 AM in response to John Degroof In response to John Degroof

To be honest, once again, any vendor relying upon Silverlight should be taken to task as Microsoft discontinued development of it in 2013 and told media companies to stop using it in 2015.


Apple's developer page for Safari 12 put it more succinctly:


Removed support for running legacy NPAPI plug-ins other than Adobe Flash.


Apple probably should have made a bigger deal about this, but given every other web browser available on Macs hasn't supported NPAPI since 2017, this wasn't Apple being non-standard or proprietary.

Sep 27, 2018 7:28 AM

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Sep 27, 2018 1:23 PM in response to William Kucharski In response to William Kucharski

I don't think SilverLight is the main issue here. Chrome and Firefox use the software API for html5 so these browsers work; albeit, at a reduced resolution. Apple chose to make Safari 12 only use hardware for html5. That's what has really left Safari unusable on machines older than 2011. When I check the specs for Mojave, my mid-2010 Mac Pro qualifies because I've upgraded to a Metal compatible graphics card. The old machine still doesn't qualify for Netflix or anything that requires html5 using Safari.

Sep 27, 2018 1:23 PM

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Sep 30, 2018 11:07 AM in response to Blarneykat5459 In response to Blarneykat5459

Although the OP and most here are concerned with Amazon video and Netflex viewing, the OP was also concerned about running silverlight. There are other websites based on Silverlight that don't use video, there are two that I use, one a city map site, one a stock charting site, and HTML 5 is not a solution. Moving from SilverLight does not seem to be a priority for them. Seems SeaMonkey (free) and iCab ($10) will still run the SilverLight extension.

Sep 30, 2018 11:07 AM

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Oct 1, 2018 1:13 PM in response to phillman55 In response to phillman55

As has been pointed out a number of times now even Microsoft has bailed on Silverlight. They no longer develop or support it. It’s a dead format so it says more about the websites that still use it than browsers that don’t. The major browsers have all deprecated support for traditional plugins in favor of better, more secure technology.

Oct 1, 2018 1:13 PM

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Question: SAFARI 12 UPDATE