Why is the new update making safari run slow?

Please download and install http://www.etresoft.com/etrecheck

Post report generate here.

Yes.

Yes. It was produced by a user of ASC and I have never heard of any problems with the many times I have suggested it use.

There are many possible causes for problems with web browsing. Below are some simple steps that may either solve the problem or point the way to a solution.

Back up all data before making any changes.

1. Restart your router and also your broadband device, if they're separate.

2. If you connect to the the router with Wi-Fi, turn Wi-Fi off and then back on.

3. If you connect with Wi-Fi and you can also connect with Ethernet, do that and turn off Wi-Fi.

4. If your browser is Safari, then take the steps recommended in this support article.

5. If the Downloads button (with the icon of a downward-pointing arrow) is showing in the toolbar, click it and then click Clear in the box that appears. The download history will be removed.

6. In the Security tab of the preferences window, uncheck the box marked

Warn when visiting a fraudulent website

if it's checked.

7. If you're running OS X 10.10 or later, select the Search tab. Uncheck the box marked

Enable Quick Website Search

if it's checked.

8. If you're running OS X 10.9 or later, select the Advanced tab and uncheck the box marked

Stop plug-ins to save power

Quit and relaunch the browser.

9. If you're running OS X 10.10 or later, open the General pane in System Preferences and uncheck the box marked

Allow Handoff between this Mac and your iCloud devices

if it's checked.

10. Enable guest logins* and log in as Guest. Don't use the Safari-only “Guest User” login created by “Find My Mac.”

While logged in as Guest, you won’t have access to any of your documents or settings. Applications will behave as if you were running them for the first time. Don’t be alarmed by this behavior; it’s normal. If you need any passwords or other personal data in order to complete the test, memorize, print, or write them down before you begin.

Test while logged in as Guest.

After testing, log out of the guest account and, in your own account, disable it if you wish. Any files you created in the guest account will be deleted automatically when you log out of it.

*Note: If you’ve activated “Find My Mac” or FileVault, then you can’t enable the Guest account. The “Guest User” login created by “Find My Mac” is not the same. Create a new account in which to test, and delete it, including its home folder, after testing.

11. Are any other web browsers installed, and are they the same? What about other Internet applications, such as iTunes and the App Store?

12. If other browsers and Internet applications are also affected, follow these instructions and test.

13. Open the iCloud preference pane and uncheck the boxes marked Safari and Photos, if they're checked.

14. Are there any other devices on the same network that can browse the Web, and if so, are they affected?

15. If you can, test Safari on another network.

16. If you know that you've modified the hosts file to block access to certain servers, undo that modification.

17. Start up in Recovery mode. In the OS X Utilities screen, select Get Help Online. A clean copy of Safari will launch. No plugins, such as Flash, will be available. While in Recovery, you'll have no access to your saved bookmarks or passwords, so make a note of those before you begin, if they're needed for the test.

After testing, restart as usual.

Post full report here so that we can analyze it for you.

Unless you don't care about your data, it's not safe to do anything at all without a backup. Downloading unknown software without researching it yourself, merely because strangers on a message board tell you to, is never going to be safe.

I suggest you shut down the computer immediately and don't turn it on again until you have at least one external hard drive (two or more recommended) to dedicate to backup. Each backup drive must have at least enough capacity to hold all the data on the internal drive comfortably, as well as any data that you have on secondary drives. Then follow the instructions in this support article.

Hello vmartin12,

I designed EtreCheck to provide a basic snapshot of the state of your Mac. It may list a number of things, sometimes in red, to get your attention. Those are things that should be addressed, but may not necessarily have anything to do with the problem you are complaining about. EtreCheck is basically a tool to help you get support faster here on Apple Support Communities so that people don't have to keep asking your for specific information about your machine. EtreCheck will list all of that information so that people can focus on the areas that are most likely to have to most noticeable improvement.

You should definitely have a backup, no doubt about that. But your lack of backup is not causing your Safari woes.