Q: Safari running slow in Yosemite

Hi ...

Might be a cookies, cache, or extensions, issue.

From your Safari menu bar click Safari > Preferences then select the Privacy tab.

Click:   Remove All Website Data

Then delete the cache.

Open a Finder window. From the Finder menu bar click Go > Go to Folder

Type or copy paste the following

~/Library/Caches/com.apple.Safari/Cache.db

Click Go then move the Cache.db file to the Trash.

Quit and relaunch Safari to test.

If that doesn't help, troubleshoot Safari extensions.

From the Safari menu bar click Safari > Preferences then select the Extensions tab. Turn that OFF, quit and relaunch Safari to test.

If that helped, turn one extension on then quit and relaunch Safari to test until you find the incompatible extension then click uninstall.

You're welcome

After Safari essentially stopped working for me altogether (no webpage would load, not even google.com), I followed all of the advice listed in this thread, but it didn't work.  Also not working was the Mac store, nor would pictures in received emails either.

It was only after I rebooted that things started to work again, but Safari is still sluggish, even though I only have 3 tabs open.

Safari was actually giving me the colored wheel when trying to type anything and it wouldn't allow me to input anything into any part of the browser. I did the steps above, including the extensions check (I had no extensions running at all) and it didn't work for me. I had to restart my Mac in order for it to work. Not sure why it did this, either.

Were you able to empty the trash once you put the cache.db file in the trash?

Mine says "this operation couldn't be completed because Cache.db is currently in use."

See this also.  Scroll down to "Fix Poor Graphics Performance by Disabling Dashboard"

http://lifehacker.com/how-to-fix-os-x-yosemites-biggest-annoyances-1646746016/+j condliffe

None of the suggested fixes are working for me on a MacBook AIr (late 2012 vintage - maxed out build so not the slowest MbA). And I have tried them.

And more. Anything I could find that could conceivably affect text entry in a browser and... nada.

Every couple of minutes, Safari just stops responding for a few (10-15) seconds. (Or it feels like it anyway. )

Happens more often when I'm on a page with a text box but I had it happen one time while in Safari Preferences disabling assorted extensions, and no browser window actually open. (Oddly enough, it hasn't happened at all while typing THIS.)

Very frustrating. Feels like the worst user experience I've had on any of MY Apple devices (excluding hardware issues over the last 20 years) in a decade (I know, I know... I've been lucky. But it looks like that luck just ran out with Yosemite.)

Safari on Yosemite takes 5-10 seconds to load a page, sometimes more.  Chrome running on the same MBPR at the same time loads the same page at once. 

I have tried everything including removing the Cache.db file and removing all the website data in Safari's preferences.

I have been struggling to use Safari all day today.  This is turning out to be more like a Windows experience.

My Machine: MacBook Pro (Retina, Mid 2012), 2.3 GHz Core i7, 16 GB DDR3.  Broadband speed 128 mbps.

I was able to delete my trash bin, but I don't recall if it was before or after I restarted the computer.

Well... as soon as I complained about that in a public forum... it stopped doing that.

Could have been turning off Dashboard and turning it back on. Could have been turning off Folder Actions (which was killing performance anyway according to the Activity Monitor) but turning that back on had no effect (yet).

Could have been NOT doing a fresh install of Yosemite. Or maybe should have waited until 10.10.1

Not a fan of hunt-n-peck troubleshooting like this.

I just turned off the Dashboard and now it works fine, too. I'll let it run for a while and see if it's really a "fix" for it or not. Doing all the above, including restart didn't really solve the issue. Not sure if it's a combination of all the above and turning off Dashboard or just turning off Dashboard at the moment that's helping.

It's simple , Safari don´t work properly in Yosemite and Chrome works , Apple must arrange this urgent , meanwhile I won´t install Yosemite in any other computer until Apple arrange this issue.

For now the only solution seems to be switching to Chrome, at least some sites could be open again, but internet is slower in general. It's interesting that Apple didn't test their internet and browser before sending the Yosemite update. They probably thing that being online is not a priority or is only for Windows users.