whenever i search specific words in the command line safari freezes

Go step by step and test.

1. Empty Cache

Safari > Preference > Advanced

Checkmark the box beside "Show Develop menu in menu bar".

Develop menu will appear in the Safari menu bar.

Click Develop and select "Empty Caches" from the dropdown.

2. Delete Cookies

Safari > Preferences > Privacy > Cookies and other website data:

Click the “Details” button.

Remove all cookies except ones from Apple, your internet service provider and banks.

3. Safari > Preferences > Extensions

Turn all extensions off and test

Turn on those one by one and test.

Launch the Console application in any of the following ways:

☞ Enter the first few letters of its name into a Spotlight search. Select it in the results (it should be at the top.)

☞ In the Finder, select Go ▹ Utilities from the menu bar, or press the key combination shift-command-U. The application is in the folder that opens.

☞ Open LaunchPad and start typing the name.

The title of the Console window should be All Messages. If it isn't, select

SYSTEM LOG QUERIES ▹ All Messages

from the log list on the left. If you don't see that list, select

View ▹ Show Log List

from the menu bar at the top of the screen.

Click the Clear Display icon in the toolbar. Then take an action that isn't working the way you expect. Select any lines that appear in the Console window. Copy them to the Clipboard by pressing the key combination command-C. Paste into a reply to this message by pressing command-V.

The log contains a vast amount of information, almost all of which is irrelevant to solving any particular problem. When posting a log extract, be selective. A few dozen lines are almost always more than enough.

Please don't indiscriminately dump thousands of lines from the log into this discussion.

Please don't post screenshots of log messages—post the text.

Some private information, such as your name or email address, may appear in the log. Anonymize before posting.

When you post the log extract, you might see an error message on the web page: "You have included content in your post that is not permitted," or "The message contains invalid characters." That's a bug in the forum software. Please post the text on Pastebin, then post a link here to the page you created.

Open the iCloud preference pane and uncheck the box marked Safari. Test. Then check the box again, if you wish. Post the results of the test.

By "test," I meant test Safari. Does it still freeze when the box is not checked?

Back up all data before proceeding.

Quit Safari if it’s running. Then select

 ▹ Force Quit…

from the menu bar. A small window will open with a list of running applications. Safari may appear in that list, even though you quit it. If so, select it and press return. Close the window.

Step 1

Hold down the option key and select

Go ▹ Library

from the Finder menu bar. Delete the following items from the Library folder (some may not exist):

Caches/com.apple.Safari

Caches/com.apple.Safari.SearchHelper

Caches/com.apple.SafariServices

Caches/com.apple.WebKit.PluginProcess

Caches/com.apple.WebProcess

Caches/Metadata/Safari

Preferences/com.apple.WebKit.PluginHost.plist

Preferences/com.apple.WebKit.PluginProcess.plist

Saved Application State/com.apple.Safari.savedState

Leave the Library folder open. Try Safari again. If the problem is solved, stop here. Close the Library folder. If you still have a problem, continue.

Step 2

Move the following items from the open Library folder to the Desktop (again, some may not exist):

Cookies/Cookies.binarycookies

Internet Plug-Ins

Preferences/ByHost/com.apple.Safari.*.plist

Preferences/com.apple.Safari.Extensions.plist

Preferences/com.apple.Safari.LSSharedFileList.plist

Preferences/com.apple.Safari.plist

Preferences/com.apple.WebFoundation.plist

PubSub/Database

Safari

SyncedPreferences/com.apple.Safari.plist

Here, "*" stands for a long string of letters, numbers, and dashes.

Note 1: You are not moving the Safari application. You’re moving a folder named “Safari.”

Note 2: This step will remove your Safari extensions, if any, and their settings. If you choose to reinstall them, do so one at a time, testing each time to make sure you haven’t restored the problem.

Try again. Your settings and bookmarks will be lost. The default set of bookmarks will be restored. Delete them all.

If Safari is now working normally (apart from the lost settings), look inside the “Safari” folder on the Desktop for a file named “Bookmarks.plist”. Select

File ▹ Import Bookmarks...

from the Safari menu bar. Import from that file. Recreate the rest of your Safari settings. You can then delete the items you moved to the Desktop.

If the issue is still not resolved, quit Safari again and put all the items you moved to the Desktop back where they were, overwriting the newer ones that may have been created in their place. You don’t need to replace the files you deleted in Step 1. Stop here and post again.

If you don’t like the results of the last step, you can undo it completely by quitting Safari and restoring the items you moved or deleted in that step from your backup, overwriting any that were created in their place.

the problem disappeared! everything works fine! your help was invaluable!

can i delete the folders on desktop now?

Yes.

When you import the bookmarks, the Reading List items should be restored.