Sep 24, 2018 If you deleted Safari and don't have a Time Machine backup or other backup, reinstall macOS to put Safari back in your Applications folder. Reinstalling macOS doesn't remove data from your computer. Before reinstalling, you might want to use Spotlight to search for Safari on your Mac. If you find it, but it's no longer in your Dock, just drag. To update Safari you need to update the OSX version. Go to the Mac App Store and see if an update is available for your model Mac. Some can can only go to 10.6, some to 10.7 and some to Yosemite. I can't say since you did not identify your model Mac Book. BTW, this is the Mac Pro desktop forum.
Safari User Guide
How Do I Update My Safari Browser For Macbook Pro
You can change options in Safari preferences so that Safari always accepts or always blocks cookies and website data.
In the Safari app on your Mac, choose Safari > Preferences, click Privacy, then do any of the following:
Prevent trackers from using cookies and website data to track you: Select 'Prevent cross-site tracking.'
Cookies and website data are deleted unless you visit and interact with the trackers' websites.
Always block cookies: Select 'Block all cookies.'
Websites, third parties, and advertisers can't store cookies and other data on your Mac. This may prevent some websites from working properly.
Always allow cookies: Deselect 'Block all cookies.'
Websites, third parties, and advertisers can store cookies and other data on your Mac.
Remove stored cookies and data: Click Manage Website Data, select one or more websites, then click Remove or Remove All.
Removing the data may reduce tracking, but may also log you out of websites or change website behavior.
See which websites store cookies or data: Click Manage Website Data.
Macbook pro boot from usb. Note: Changing your cookie preferences or removing cookies and website data in Safari may change or remove them in other apps.
Safari User Guide
You can prevent webpages from displaying pop-up windows.
In the Safari app on your Mac, choose Safari > Preferences, then click Websites.
Click Pop-up Windows.
Block pop-up windows for:
A website in the list: Select the website in the right column, then choose the option you want.
Reader for pc software download. All websites that aren't currently customized: Click the 'When visiting other websites' pop-up menu in the bottom-right corner of the pane, then choose the option you want.
You can see all websites you've customized under Configured Websites. If you don't see Configured Websites, either you haven't customized a website yet, or you've cleared the list. See Change Websites preferences in Safari on Mac.
All websites: Make sure no websites are listed under Configured Websites (to clear the list quickly, select the websites, then click Remove). Click the 'When visiting other websites' pop-up menu, then choose the option you want.
Macbook pro boot from usb. Note: Changing your cookie preferences or removing cookies and website data in Safari may change or remove them in other apps.
Safari User Guide
You can prevent webpages from displaying pop-up windows.
In the Safari app on your Mac, choose Safari > Preferences, then click Websites.
Click Pop-up Windows.
Block pop-up windows for:
A website in the list: Select the website in the right column, then choose the option you want.
Reader for pc software download. All websites that aren't currently customized: Click the 'When visiting other websites' pop-up menu in the bottom-right corner of the pane, then choose the option you want.
You can see all websites you've customized under Configured Websites. If you don't see Configured Websites, either you haven't customized a website yet, or you've cleared the list. See Change Websites preferences in Safari on Mac.
All websites: Make sure no websites are listed under Configured Websites (to clear the list quickly, select the websites, then click Remove). Click the 'When visiting other websites' pop-up menu, then choose the option you want.
If you choose Block and Notify for pop-up windows on a website, click the icon in the Smart Search field to display the pop-up windows.
Note: Blocking pop-ups might also block some content you want to see.