On OS X, the file "FlashPlayerInstallManager.log" can be located in the following folder:
You can navigate to this folder using the following steps:
1. Select the Go -> Go to Folder... menu item from the Finder menu
2. Copy and paste "~/Library/Logs" into the Go to Folder dialog
3. Locate the "FlashPlayerInstallManager.log" in the folder that appears.
This file can be opened with TextEdit or the Console application. When troubleshooting an installation problem, please copy and paste the contents of your log into your forum post.