It seems like you're looking for instructions on how to install an older version of Core Temp, specifically version 1.18.1, on a Mac.

Unfortunately, the latest version of Core Temp available is not compatible with Mac OS. However, I can guide you through installing an older version that should work on your Mac.

Here are the steps:

1. Go to the official Core Temp website: 'www.alcpu.com/CoreTemp'(http://www.alcpu.com/CoreTemp)

2. Click on the 'Older Versions' section and download Core Temp 1.18.1 for Mac.

3. Once the download is complete, open the downloaded file and follow the installation instructions.

Note that you may need to allow your Mac to run apps from unidentified developers in order to install an older version of Core Temp. To do this:

* Go to System Preferences

* Click on Security & Privacy

* Click on the 'General' tab

* Check the box next to 'Allow apps downloaded from: Anywhere'

After installation, you should be able to run Core Temp 1.18.1 on your Mac.

Remember that using an older version of Core Temp may not provide you with the latest features and bug fixes, so it's recommended to check for updates regularly to ensure you have the most stable and secure version available.

For mac instal Core Temp 1.18.1