How to Reset Hosts File to Default on Mac and Windows
If you’re experiencing issues accessing certain websites or connecting to online services, your hosts file may have been modified. This file acts as a mapping guide for your computer, directing it to the correct IP addresses for websites. In this comprehensive guide, we’ll walk you through the step-by-step process on how to reset hosts file to default on Mac and Windows.
Why Reset Hosts File to Default?
Your hosts file can get corrupted or unintentionally modified by malware, viruses, or manual errors. This can lead to a range of issues, such as:
- Inability to access certain websites
- Incorrect website redirects
- Slow browsing speeds due to mismatched IP addresses
Resetting your hosts file to default restores it to its original state, ensuring that your computer follows the correct IP address mappings again.
Comprehensive Guide on How to Reset Hosts File to Default
Mac
1. Open Terminal
Navigate to your Applications folder > Utilities and open Terminal.
2. Reset Hosts File
In Terminal, type the following command and press Enter:
sudo nano /etc/hosts
3. Enter Password and Overwrite File
Enter your Mac’s password. Use the arrow keys to navigate to the bottom of the file and add a "#" symbol before all lines except the first one (which should contain "127.0.0.1 localhost"). Press Ctrl + O to save and Ctrl + X to exit.
Windows
1. Open Command Prompt
Press the Windows key + R and type "cmd" in the Run dialog box.
2. Change Directory and Reset Hosts File
In the Command Prompt, type the following commands:
cd C:WindowsSystem32driversetc
copy "C:WindowsSystem32driversetchosts.txt" "C:WindowsSystem32driversetchosts"
3. Confirm Reset
The original hosts file will be overwritten with the default version.
Additional Information on Hosts File
1. Location of Hosts File
- Mac: /etc/hosts
- Windows: C:WindowsSystem32driversetchosts
2. Contents of Default Hosts File
The default hosts file contains the following line:
127.0.0.1 localhost
3. Troubleshooting Tips
If you’re still encountering issues after resetting the hosts file, try:
- Restarting your computer
- Clearing your browser cache and cookies
- Running a virus or malware scan
Conclusion
Resetting your hosts file to default can resolve a myriad of issues related to website accessibility and connectivity. By following the detailed instructions provided in this guide, you can effectively restore the hosts file on your Mac or Windows computer. Remember to restart your device and clear any browser data to ensure the changes take full effect.
FAQ about How to Reset Hosts File to Default on Mac/Windows
1. What is a hosts file?
A hosts file is a text file that maps domain names to IP addresses. It allows you to override the DNS system and specify custom IP addresses for specific websites.
2. Why would I need to reset my hosts file?
You may need to reset your hosts file if it has been modified by malware or if you have made changes that you want to revert.
3. How do I reset my hosts file on Mac?
Using Terminal:
- Open Terminal (Applications > Utilities > Terminal).
- Type the following command:
sudo nano /etc/hosts - Press Enter and enter your administrator password.
- Delete all the lines in the hosts file except the first line (
127.0.0.1 localhost). - Press Control+O to save the changes.
- Press Control+X to exit nano.
Using TextEdit:
- Open TextEdit (Applications > TextEdit).
- Click on "File" > "Open".
- Navigate to "/etc/hosts".
- Delete all the lines in the hosts file except the first line.
- Click on "File" > "Save".
4. How do I reset my hosts file on Windows?
Using Notepad:
- Open Notepad (Start > All Programs > Accessories > Notepad).
- Click on "File" > "Open".
- Navigate to
%SystemRoot%System32driversetc. - Select "All Files" from the "Files of type" dropdown.
- Double-click on "hosts".
- Delete all the lines in the hosts file except the first line (
127.0.0.1 localhost). - Click on "File" > "Save".
Using Windows Explorer:
- Open Windows Explorer (Windows Key + E).
- Navigate to
%SystemRoot%System32driversetc. - Right-click on "hosts" and select "Edit".
- Delete all the lines in the hosts file except the first line.
- Click on "File" > "Save".
5. Do I need to restart my computer after resetting my hosts file?
Yes, it is recommended to restart your computer after resetting the hosts file. This will ensure that all changes are applied properly.
6. What if I can’t save the changes to my hosts file?
You may need to grant yourself administrator privileges to save the changes. See the documentation for your operating system for instructions on how to do this.
7. Can I use a command prompt to reset my hosts file?
Yes, you can use the following command prompts to reset your hosts file:
Mac:
sudo chown root /etc/hosts
sudo chmod 644 /etc/hosts
Windows:
attrib -r -s -h %SystemRoot%System32driversetchosts
echo 127.0.0.1 localhost > %SystemRoot%System32driversetchosts
8. How can I prevent my hosts file from being modified?
You can set the hosts file to read-only mode to prevent it from being modified by malware or other programs.
Mac:
sudo chmod 444 /etc/hosts
Windows:
attrib +r %SystemRoot%System32driversetchosts
9. What are some common signs that my hosts file has been compromised?
- Websites not loading properly or loading slowly
- Unusual pop-up ads or redirects
- Error messages saying that the website cannot be found
- Unexpected changes to your internet connection
