Table of Contents<\/summary>\n\n\n- What Is DNS Cache?<\/a><\/li>\n
- Why Flushing DNS Cache Is Important<\/a><\/li>\n
- How to Clear DNS Cache on macOS<\/a><\/li>\n
- Flush DNS Cache on macOS Sequoia, Sonoma, Ventura, Monterey, and Newer<\/a><\/li>\n
- Flush DNS Cache on Older macOS Versions<\/a><\/li>\n
- What Happens After You Flush DNS Cache?<\/a><\/li>\n
- Should You Flush DNS Cache Regularly on Mac?<\/a><\/li>\n
- Final Thoughts<\/a><\/li>\n<\/ul>\n<\/div>\n<\/details><\/div>\n
What Is DNS Cache?<\/h2>\n
Before jumping into commands and steps, it helps to understand what DNS cache actually is<\/a> and why your Mac keeps it around.<\/p>\nThe Domain Name System, or DNS, works like the Internet\u2019s phonebook. Humans prefer website names like example.com<\/code>, while computers communicate using IP addresses made up of numbers. DNS translates the name you type into the numeric address your computer needs to reach the website.<\/p>\nYour Mac stores these translations locally in something called a DNS cache. Every time you visit a website, your system saves its IP address so it doesn\u2019t need to ask a DNS server again the next time you visit. This makes browsing faster and smoother.<\/p>\n
The problem is that this cache doesn\u2019t always age well.<\/p>\n
Why Flushing DNS Cache Is Important<\/h2>\n
Most of the time, DNS cache quietly does its job. But when it goes wrong, it can break your browsing experience in confusing ways.<\/p>\n
One common reason to flush DNS is troubleshooting. If a website won\u2019t load, loads very slowly, or shows errors like \u201cDNS server not responding,\u201d your Mac may be using outdated or incorrect DNS information. Websites change servers and IP addresses, but your local cache may still point to the old location.<\/p>\n
Security is another big reason. DNS cache can be targeted by attacks known as DNS cache poisoning. In simple terms, malicious software can alter cached records and redirect you to fake or harmful websites that look legitimate. Clearing the cache helps remove these corrupted entries.<\/p>\n
Flushing DNS is also helpful after:<\/p>\n
\n- Changing DNS servers<\/li>\n
- Editing the hosts file<\/li>\n
- Switching networks<\/li>\n
- Setting up web development or testing environments<\/li>\n<\/ul>\n
In short, flushing DNS forces your Mac to forget old information and ask fresh questions again.<\/p>\n
How to Clear DNS Cache on macOS<\/h2>\n
Clearing DNS cache on a Mac may sound technical, but the process is straightforward. You don\u2019t need special tools or advanced knowledge, just a built-in app and one command.<\/p>\n
To do this, you\u2019ll need:<\/p>\n
\n- Access to the Terminal app<\/li>\n
- Your Mac\u2019s administrator password<\/li>\n
- The correct command for your macOS version<\/li>\n<\/ul>\n
Terminal is macOS\u2019s command-line tool. It allows you to give the operating system direct instructions using text commands.<\/p>\n
The fastest way to open Terminal is using Spotlight:<\/p>\n
\n- Press Command + Space<\/strong> on your keyboard.<\/li>\n
- Type Terminal<\/strong>.<\/li>\n
- Press Return<\/strong>.
![\"Ress](\"data:image\/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==\")
<\/li>\n<\/ol>\nYou can also open it manually by going to Applications > Utilities > Terminal<\/strong>.<\/p>\nOnce open, you\u2019ll see a simple window with a blinking cursor. This is where you\u2019ll enter the DNS flush command.<\/p>\n
Flush DNS Cache on macOS Sequoia, Sonoma, Ventura, Monterey, and Newer<\/h2>\n
Modern versions of macOS all use the same command, which makes things easy. This includes:<\/p>\n
\n- macOS Sequoia (15.x)<\/li>\n
- macOS Sonoma (14.x)<\/li>\n
- macOS Ventura (13.x)<\/li>\n
- macOS Monterey (12.x)<\/li>\n
- macOS Big Sur (11.x)<\/li>\n
- macOS Catalina (10.15)<\/li>\n<\/ul>\n
After opening Terminal, copy and paste the following command and press Return<\/strong>:<\/p>\nsudo dscacheutil -flushcache; sudo killall -HUP mDNSResponder <\/code><\/pre>\nYou\u2019ll then be asked to enter your Mac\u2019s password<\/a>. As you type, nothing will appear on the screen, not even dots or asterisks. This is normal and done for security reasons. Type the password and press Return<\/strong>.
<\/p>\nThere will be no confirmation message. If the command runs and you see a new prompt line, the DNS cache has been successfully cleared.<\/p>\n
Flush DNS Cache on Older macOS Versions<\/h2>\n
If you\u2019re using an older version of macOS or OS X, the command may be different. The steps are the same, only the command changes.<\/p>\n
Here are the correct commands by version:<\/p>\n
\n- macOS Mojave, High Sierra, Sierra, El Capitan, Lion, Mountain Lion, Mavericks<\/strong>
: sudo killall -HUP mDNSResponder<\/code><\/li>\n- OS X Yosemite<\/strong>
: sudo discoveryutil udnsflushcaches<\/code><\/li>\n- OS X Snow Leopard<\/strong>
: sudo dscacheutil -flushcache<\/code><\/li>\n- OS X Leopard<\/strong>
: sudo lookupd -flushcache<\/code><\/li>\n- OS X Tiger: <\/strong>
lookupd -flushcache<\/code><\/li>\n<\/ul>\nAfter running the command, enter your password if prompted and wait for the terminal prompt to return.<\/p>\n
Related:<\/strong> How to Clear the DNS Cache on an iPhone or iPad<\/a><\/p>\nWhat Happens After You Flush DNS Cache?<\/h2>\n
Once the DNS cache is cleared, your Mac immediately starts rebuilding it. The next time you visit a website, your system asks a DNS server for fresh information instead of relying on old records.<\/p>\n
You may notice:<\/p>\n
\n- Websites are loading correctly again<\/li>\n
- Fewer DNS-related errors<\/li>\n
- Changes to DNS settings are taking effect<\/li>\n<\/ul>\n
There\u2019s no downside to flushing DNS occasionally. Your Mac will simply re-learn what it needs as you browse.<\/p>\n
Should You Flush DNS Cache Regularly on Mac?<\/h2>\n
For most users, flushing DNS cache isn\u2019t something you need to do often. However, it\u2019s a great habit if you:<\/p>\n
\n- Frequently troubleshoot network issues<\/a><\/li>\n
- Work with websites or servers<\/li>\n
- Change DNS settings often<\/li>\n
- Care about privacy and security<\/li>\n<\/ul>\n
Think of it like clearing a cluttered desk. You\u2019re not deleting anything important, you\u2019re just making room for accurate, up-to-date information.<\/p>\n
Final Thoughts<\/h2>\n
Flushing DNS cache on a Mac is one of those quiet fixes that feels small but delivers big results. It doesn\u2019t require special apps, restarts, or advanced skills. A single command can restore broken connections, resolve loading issues, and protect you from outdated or unsafe DNS records.<\/p>\n
The next time a website refuses to cooperate and everything else seems fine, remember this trick. Sometimes, the internet just needs your Mac to forget and start fresh.<\/p>\n
The post How to Flush DNS Cache on Mac (All macOS Versions)<\/a> appeared first on iGeeksBlog<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"Sometimes websites won\u2019t load even when your internet is fine. This guide explains what DNS cache is and how to safely clear it on both newer and older Macs using simple Terminal commands.
\nThe post <\/p>\n","protected":false},"author":0,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[17],"tags":[],"class_list":["post-2056","post","type-post","status-publish","format-standard","hentry","category-mac"],"_links":{"self":[{"href":"http:\/\/www.valentinedaysgifts.com\/index.php\/wp-json\/wp\/v2\/posts\/2056","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/www.valentinedaysgifts.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.valentinedaysgifts.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"replies":[{"embeddable":true,"href":"http:\/\/www.valentinedaysgifts.com\/index.php\/wp-json\/wp\/v2\/comments?post=2056"}],"version-history":[{"count":0,"href":"http:\/\/www.valentinedaysgifts.com\/index.php\/wp-json\/wp\/v2\/posts\/2056\/revisions"}],"wp:attachment":[{"href":"http:\/\/www.valentinedaysgifts.com\/index.php\/wp-json\/wp\/v2\/media?parent=2056"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.valentinedaysgifts.com\/index.php\/wp-json\/wp\/v2\/categories?post=2056"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.valentinedaysgifts.com\/index.php\/wp-json\/wp\/v2\/tags?post=2056"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
- \n
- What Is DNS Cache?<\/a><\/li>\n
- Why Flushing DNS Cache Is Important<\/a><\/li>\n
- How to Clear DNS Cache on macOS<\/a><\/li>\n
- Flush DNS Cache on macOS Sequoia, Sonoma, Ventura, Monterey, and Newer<\/a><\/li>\n
- Flush DNS Cache on Older macOS Versions<\/a><\/li>\n
- What Happens After You Flush DNS Cache?<\/a><\/li>\n
- Should You Flush DNS Cache Regularly on Mac?<\/a><\/li>\n
- Final Thoughts<\/a><\/li>\n<\/ul>\n<\/div>\n<\/details><\/div>\n
What Is DNS Cache?<\/h2>\n
Before jumping into commands and steps, it helps to understand what DNS cache actually is<\/a> and why your Mac keeps it around.<\/p>\n
The Domain Name System, or DNS, works like the Internet\u2019s phonebook. Humans prefer website names like
example.com<\/code>, while computers communicate using IP addresses made up of numbers. DNS translates the name you type into the numeric address your computer needs to reach the website.<\/p>\nYour Mac stores these translations locally in something called a DNS cache. Every time you visit a website, your system saves its IP address so it doesn\u2019t need to ask a DNS server again the next time you visit. This makes browsing faster and smoother.<\/p>\n
The problem is that this cache doesn\u2019t always age well.<\/p>\n
Why Flushing DNS Cache Is Important<\/h2>\n
Most of the time, DNS cache quietly does its job. But when it goes wrong, it can break your browsing experience in confusing ways.<\/p>\n
One common reason to flush DNS is troubleshooting. If a website won\u2019t load, loads very slowly, or shows errors like \u201cDNS server not responding,\u201d your Mac may be using outdated or incorrect DNS information. Websites change servers and IP addresses, but your local cache may still point to the old location.<\/p>\n
Security is another big reason. DNS cache can be targeted by attacks known as DNS cache poisoning. In simple terms, malicious software can alter cached records and redirect you to fake or harmful websites that look legitimate. Clearing the cache helps remove these corrupted entries.<\/p>\n
Flushing DNS is also helpful after:<\/p>\n
- \n
- Changing DNS servers<\/li>\n
- Editing the hosts file<\/li>\n
- Switching networks<\/li>\n
- Setting up web development or testing environments<\/li>\n<\/ul>\n
In short, flushing DNS forces your Mac to forget old information and ask fresh questions again.<\/p>\n
How to Clear DNS Cache on macOS<\/h2>\n
Clearing DNS cache on a Mac may sound technical, but the process is straightforward. You don\u2019t need special tools or advanced knowledge, just a built-in app and one command.<\/p>\n
To do this, you\u2019ll need:<\/p>\n
- \n
- Access to the Terminal app<\/li>\n
- Your Mac\u2019s administrator password<\/li>\n
- The correct command for your macOS version<\/li>\n<\/ul>\n
Terminal is macOS\u2019s command-line tool. It allows you to give the operating system direct instructions using text commands.<\/p>\n
The fastest way to open Terminal is using Spotlight:<\/p>\n
- \n
- Press Command + Space<\/strong> on your keyboard.<\/li>\n
- Type Terminal<\/strong>.<\/li>\n
- Press Return<\/strong>.
<\/li>\n<\/ol>\nYou can also open it manually by going to Applications > Utilities > Terminal<\/strong>.<\/p>\n
Once open, you\u2019ll see a simple window with a blinking cursor. This is where you\u2019ll enter the DNS flush command.<\/p>\n
Flush DNS Cache on macOS Sequoia, Sonoma, Ventura, Monterey, and Newer<\/h2>\n
Modern versions of macOS all use the same command, which makes things easy. This includes:<\/p>\n
- \n
- macOS Sequoia (15.x)<\/li>\n
- macOS Sonoma (14.x)<\/li>\n
- macOS Ventura (13.x)<\/li>\n
- macOS Monterey (12.x)<\/li>\n
- macOS Big Sur (11.x)<\/li>\n
- macOS Catalina (10.15)<\/li>\n<\/ul>\n
After opening Terminal, copy and paste the following command and press Return<\/strong>:<\/p>\n
sudo dscacheutil -flushcache; sudo killall -HUP mDNSResponder <\/code><\/pre>\nYou\u2019ll then be asked to enter your Mac\u2019s password<\/a>. As you type, nothing will appear on the screen, not even dots or asterisks. This is normal and done for security reasons. Type the password and press Return<\/strong>.
<\/p>\nThere will be no confirmation message. If the command runs and you see a new prompt line, the DNS cache has been successfully cleared.<\/p>\n
Flush DNS Cache on Older macOS Versions<\/h2>\n
If you\u2019re using an older version of macOS or OS X, the command may be different. The steps are the same, only the command changes.<\/p>\n
Here are the correct commands by version:<\/p>\n
- \n
- macOS Mojave, High Sierra, Sierra, El Capitan, Lion, Mountain Lion, Mavericks<\/strong>
: sudo killall -HUP mDNSResponder<\/code><\/li>\n- OS X Yosemite<\/strong>
: sudo discoveryutil udnsflushcaches<\/code><\/li>\n- OS X Snow Leopard<\/strong>
: sudo dscacheutil -flushcache<\/code><\/li>\n- OS X Leopard<\/strong>
: sudo lookupd -flushcache<\/code><\/li>\n- OS X Tiger: <\/strong>
lookupd -flushcache<\/code><\/li>\n<\/ul>\nAfter running the command, enter your password if prompted and wait for the terminal prompt to return.<\/p>\n
Related:<\/strong> How to Clear the DNS Cache on an iPhone or iPad<\/a><\/p>\n
What Happens After You Flush DNS Cache?<\/h2>\n
Once the DNS cache is cleared, your Mac immediately starts rebuilding it. The next time you visit a website, your system asks a DNS server for fresh information instead of relying on old records.<\/p>\n
You may notice:<\/p>\n
- \n
- Websites are loading correctly again<\/li>\n
- Fewer DNS-related errors<\/li>\n
- Changes to DNS settings are taking effect<\/li>\n<\/ul>\n
There\u2019s no downside to flushing DNS occasionally. Your Mac will simply re-learn what it needs as you browse.<\/p>\n
Should You Flush DNS Cache Regularly on Mac?<\/h2>\n
For most users, flushing DNS cache isn\u2019t something you need to do often. However, it\u2019s a great habit if you:<\/p>\n
- \n
- Frequently troubleshoot network issues<\/a><\/li>\n
- Work with websites or servers<\/li>\n
- Change DNS settings often<\/li>\n
- Care about privacy and security<\/li>\n<\/ul>\n
Think of it like clearing a cluttered desk. You\u2019re not deleting anything important, you\u2019re just making room for accurate, up-to-date information.<\/p>\n
Final Thoughts<\/h2>\n
Flushing DNS cache on a Mac is one of those quiet fixes that feels small but delivers big results. It doesn\u2019t require special apps, restarts, or advanced skills. A single command can restore broken connections, resolve loading issues, and protect you from outdated or unsafe DNS records.<\/p>\n
The next time a website refuses to cooperate and everything else seems fine, remember this trick. Sometimes, the internet just needs your Mac to forget and start fresh.<\/p>\n
The post How to Flush DNS Cache on Mac (All macOS Versions)<\/a> appeared first on iGeeksBlog<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"
Sometimes websites won\u2019t load even when your internet is fine. This guide explains what DNS cache is and how to safely clear it on both newer and older Macs using simple Terminal commands.
\nThe post <\/p>\n","protected":false},"author":0,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[17],"tags":[],"class_list":["post-2056","post","type-post","status-publish","format-standard","hentry","category-mac"],"_links":{"self":[{"href":"http:\/\/www.valentinedaysgifts.com\/index.php\/wp-json\/wp\/v2\/posts\/2056","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/www.valentinedaysgifts.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.valentinedaysgifts.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"replies":[{"embeddable":true,"href":"http:\/\/www.valentinedaysgifts.com\/index.php\/wp-json\/wp\/v2\/comments?post=2056"}],"version-history":[{"count":0,"href":"http:\/\/www.valentinedaysgifts.com\/index.php\/wp-json\/wp\/v2\/posts\/2056\/revisions"}],"wp:attachment":[{"href":"http:\/\/www.valentinedaysgifts.com\/index.php\/wp-json\/wp\/v2\/media?parent=2056"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.valentinedaysgifts.com\/index.php\/wp-json\/wp\/v2\/categories?post=2056"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.valentinedaysgifts.com\/index.php\/wp-json\/wp\/v2\/tags?post=2056"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
- Frequently troubleshoot network issues<\/a><\/li>\n
- OS X Yosemite<\/strong>
- macOS Mojave, High Sierra, Sierra, El Capitan, Lion, Mountain Lion, Mavericks<\/strong>
- Type Terminal<\/strong>.<\/li>\n
- Press Command + Space<\/strong> on your keyboard.<\/li>\n
- Why Flushing DNS Cache Is Important<\/a><\/li>\n
![\"Ress](\"https:\/\/www.igeeksblog.com\/wp-content\/uploads\/2026\/02\/Ress-Command-Space-on-Your-Keyboard-and-Type-Terminal.jpg\")
<\/li>\n<\/ol>\n![\"After](\"https:\/\/www.igeeksblog.com\/wp-content\/uploads\/2026\/02\/After-Opening-Terminal-Copy-and-Paste-Command-and-Press-Return.jpg\")
<\/p>\n