Flash Player Too Slow in Safari

I've had this problem ever since I can remember, and I'm not sure why.

Anytime a website has flash on it, whether it be a flash-based website or a Youtube video, Safari cannot handle it. Although Safari rarely crashes when it comes to something that is flash-based, it is VERY jerky and slow.

For example, with a Youtube video, if I were to have the entire video load/buffer and then press play, the video would be jerky and lagging, but the audio would work just fine.

With a flash-based website, Safari is very jerky with the image, but the audio is fine. Take http://www.wonka.com/ for example. When the site loads, the music starts and plays just fine, but the image of the hat flying across the screen is jerky, and it takes much longer than it should to get to its final position before all the confetti comes flying out of the hat (also very slowly). Additionally, the text in the upper left hand corner of the screen ascends very slowly and jerkily, rather than quickly and smooth.

Whenever something flash-based loads in Safari, the CPU maxes out at 100% in Activity monitor (with %User hovering around 60% and %System hovering around 40%). This is just unnacceptable. I have had much slower computers that run Windows but can handle a Youtube video or flash-based website perfectly.

My iMac specs can be seen below. Does anyone know what might be wrong?

(On a side note, Firefox isn't AS jerky with flash as Safari is, but it still is not as fast as it should be. I think that isolates the issue as a system processing problem or a flash problem, as opposed to a browser problem.)

iMac G5 [w/o Built-in iSight] (2GHz; 1.5 GB RAM; PowerPC), Mac OS X (10.4.11), External iSight, FCE 3.5.1, iLife '06

Posted on Aug 21, 2009 9:58 AM

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22 replies

Sep 26, 2009 4:49 PM in response to Fusion Factor

Same problem here. All of a sudden Flash became so slow it's incredible. Tried Safari 4.0.3 (6531.9) as well as Firefox 3.5.3

Running everything on Aluminum iMac 20", 4 Gb RAM, 1 TB HD. Never ever had any problems with Flash in the past, and few days ago browsing pages containing Flash became impossible. Not to mention watching YouTube videos.

Something smells fishy here... I'm guessing one of the latest Apple system updates, or maybe even just Adobe Flash update.

Someone needs to inspect this thing carefully.

Sep 28, 2009 5:28 AM in response to Fusion Factor

I've been having the same slowdown problems Fusion Factor. I've reset safari, cleared caches, repaired permissions and uninstalled / reinstalled flash all to no avail.

It seems localized to just my primary user account's safari since firefox works fine as does safari on my secondary user account.

I don't know what else to do short of delete and reinstall safari.

Oct 4, 2009 1:36 PM in response to Fusion Factor

I've found a temp solution for the problem of flash being slow in Safari 4 in Snow Leopard. Control click on the app and click on "Get Info" than click on "Open in 32-bit mode" this made flash on my mac go back to the original speed I'm use to. I think that flash is not very compatible with the 64-bit safari rendition. Let me know if this works for you.

Oct 5, 2009 4:17 PM in response to epuente

I'm afraid we were talking about Flash plug-in in Safari and for that matter in Firefox too. It looks like something happened with latest Flash plug-in update.

I have no problems with Flash CS4 developers utility in Snow Leopard whatsoever. It works perfectly fine, everything is super fast and Flash even less frequently crashes.

Mar 24, 2010 12:56 AM in response to Fusion Factor

After reformatting the hard drive, reinstalling OS X, and basically starting all over, Flash finally works properly!

If you're having this problem, and there seems to be no way to get rid of it, reformatting should do the trick. Although it's tedious to have to reinstall all your programs and data, it's worth it when half of the internet's websites load properly! 🙂

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Flash Player Too Slow in Safari

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