# Login in issue

**URL:** <https://forums.sketchup.com/t/login-in-issue/317246>\
**Category:** Technical Problems\
**Tags:** mac\
**Created:** [March 3, 2025, 7:24pm UTC](https://forums.sketchup.com/t/login-in-issue/317246 "2025-03-03T19:24:25Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![DanRathbun](https://sea2.discourse-cdn.com/sketchup/user_avatar/forums.sketchup.com/danrathbun/32/500_2.png) [@DanRathbun](https://forums.sketchup.com/u/DanRathbun)\
**Post date:** [March 3, 2025, 11:41pm UTC](https://forums.sketchup.com/t/login-in-issue/317246/2 "2025-03-03T23:41:02Z")

</div>

`127.0.0.1` is the loopback address, commonly referred to as “localhost.” It’s used to establish an IP connection to the same machine or computer being used by the end-user, which is typically for testing and development purposes.

You can try:

(a) **Clear Cache and Cookies** : Sometimes, clearing the browser cache and cookies can resolve the issue. This can be done through the browser settings.

(b) **Delete Login Session File** :

- On **MS Windows** navigate to:  
`%AppData%/SketchUp/SketchUp 2024/` and delete the `login_session.dat` file.  
\* In versions 2023 and older the `login_session.dat` file is in the `SketchUp` subfolder of the path given above.

- On Apple MacOS navigate to:  
`~/Library/Application Support/SketchUp 2024/` and find the `login_session.dat` file there or in the `SketchUp` subfolder, then delete it.

Change the version of SketchUp in the given paths for the version you are trying to log into. I wrote `2024` because your forum profile still says this version.

Then, restart SketchUp and try signing in again.

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_[View the full topic](https://forums.sketchup.com/t/login-in-issue/317246)._