# Why won’t PostLab launch after updating or installing it?

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This primarily affects macOS 12 (Monterey) users.
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You are likely using macOS 12.7.x (Monterey), or you upgraded macOS 12.7.x to a newer version after updating or installing PostLab.

If you updated or installed PostLab to the current release, and PostLab will not launch (i.e. it crashes with a macOS-level crash report), take these steps to reinstall PostLab:

1. Perform a comprehensive uninstall of PostLab using AppCleaner:
   1. Download AppCleaner - <https://freemacsoft.net/appcleaner/>
   2. Drag-and-drop PostLab from `/Applications` to AppCleaner then click `Remove`.
   3. In Finder, empty your Trash.
2. Download and reinstall PostLab: <https://hedge.video/download/postlab/macos>

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Do not relaunch PostLab yet.
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3. In Finder, delete these two folders (if they exist), then empty your Trash:
   1. In Finder, go to `Go > Go to Folder...` (or `Command-Shift-G`).
   2. Copy/paste this into the dialog that appears: `~/Library/Caches/`
      * (The tilde `~` is a macOS shortcut for your macOS account home folder.)
4. Delete these two folders:
   1. `io.sentry`
   2. `SentryCrash`
5. Empty your Trash in Finder.
6. Now relaunch PostLab.

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A Sentry report dialog (i.e. `Something unexpected happened.`) may appear multiple times after taking these steps. These dialog boxes are related to removing the cached Sentry folders.
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Are you using macOS 12, and is PostLab still not launching? [Follow these steps to `Request Support` in PostLab.](https://docs.hedge.video/postlab-classic/faq/pages/-M_gs28S8PTgsBukRg-s#id-3.-request-support)


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