Webpage using significant energy / memory on Mac

Just updated to macOS Mojave (10.14) and problem persists. The only solution I've found so far is to quit using Safari and switch to Firefox or Chrome.

Oops, I spoke too fast. Still getting the warning after checking the internet plug ins. I only get this when warning I use the msn website on my mac. Maybe it has to do with a softeare update from Apple?

I have recently purchased a new iMac 27". It replaces a 2014 Mac mini. I, too, continue to get that "warning", especially on Facebook. I never saw it on my Mini at all which was running the same OS and all else being equal. What would make the new machine do this I've wondered. I even called support and they were not able to assist at all. Now I see I'm actually not the only one with this issue which, at least, makes me feel a bit better....LOL. I've tried everything, resetting, running "First Aid" from Utilities, checking resolution, etc. and it still shows up. Seems to be only with Safari, not with Firefox. Hoping to see some response from someone who has come up with some type of reasonable explanation.

I switched to Chrome as my default browser a few of weeks ago and that's been working really well for me. But I will say when listening to my iTunes on my laptop it did auto-reboot on me with no warning about 3 days ago. I may try one last trip to Apple but not sure I'm going get a different result.

Try anything but NOT something made by Apple. Safari has had glitches galore since forever. Try Chrome. My iPhone GPS is constantly shutting off the sound so I have to look at my iPhone while driving up to 70 mph, then it constantly reroutes because I miss my turn not having been notified by GPS. I just arrived late for the third time to a job interview because of it. I have complained numerous times without any help from Apple.

Apple tech support is the best but they can't do anything to help me with the garbage the so-called "developers" produce. I HATE APPLE!!!!!!!!!

Mine started in early April with system update to 10.13.4 which was released on March 29, 2018. The previous version was released in January and I did not have this issue in March or earlier. That's why I think it was the update to 10.13.4.

Mine happens when I stream video with MLB.com.

There's another thread started at the same time when this issue started,

Problem with High Sierra 10.13.4

There was a previous poster who said:

Thats because there is nothing wrong with your computer or safari. The webpage is simply using alot of processing power. I get this message specifically on some sites that have very large & live comment sections. All the message means is that because the browser (that page specifically) is using so much processing power, the mac may be slower with other tasks.

Eric needs to calm down with all this stuff he's having you do because it's not going to "fix" this situation. Getting a faster mac would or just ignoring the message.

While I appreciate this explanation, it's not a fix. Apple became the first American company to have a $1 TRILLION DOLLAR evaluation. It's 2018 and I can't go on Pinterest, or you can't steam videos, or others who can't go on Facebook? And it's not as easy as closing the page or ignoring it. If my husband or sons pick up my laptop, even they say "Your laptop is horrible - why is it freezing etc?"

Thanks Garry

I have the same problem on a Macbook Air 13 Early 2015 with High Sierra. I've tried cleaning all that was possible on Safari, created a new user, and finaly reinstalled Mac OS. The problem persists, so it's a problem with Safari itself or some code that Facebook uses. I have no problem using Chrome. Installed High Sierra again, but this time I didn't update it to the last version. Last version is 10.13.6. I installed 10.13.3 and the problem is also present. Maybe something with the Facebook code?

I've been on the phone with Apple Care and then to the Genius Bar - neither could resolve the problem. At least the Genius Bar knew about the issue - Apple Care knew nothing. I'm now using Crome until Apple resolves this issue.
Please, Apple, find a solution to this...

Same here. I really think this problem has to do with the most recent Apple update to the operating system High Sierra 10.13.4. I started getting the warning after I updated:(

I use many Safari extensions but I also have Dr. Cleaner- do you think that the app could be my problem? It's always saying I'm using like 80-90% of my memory. 😕

Hi, i had the same problem and i read all the comments, what i did was to uncheck that "internet plug-ins" u said and it worked for me, i don't see that banner anymore.
i hope it'll help you guys

tekey wrote:

I have done everything asked to get rid of this and nothing has worked. It's frustrating when the pop up occurs and even more so when the page automatically refreshes because of this.

See this thread: Re: Safari message stating "this webpage is using significant energy"

Some things are out of your control. I see this as a non-issue. Safari is working in your behalf to keep everything running smooth as possible in it's rendering engine.

My only suggestion is you could try a different browser and see if it renders the page any more efficiently.