Restoring from Time Machine Backup – Cannot replace Mac HD I'm trying to restore my computer to a previous backup of my Mac HD. However, when I try, I see an error notice telling me that I cannot, since this file is not able to be deleted:


  .PKInstallSandboxManager-SystemSoftware


How do I restore to this backup from last week, considering that I can't delete the above folder, or resultantly, another version of Mac HD ?

What I've done:

Enter Time Machine > scroll through to appropriate backup > hit "restore" button > You can erase volume “Macintosh HD” and replace it with the restored volume or cancel to stop the restore. > receive error notice related to the above.
My assumption from how your question is worded is that you're trying to recover an entire HD, not just a single file, folder etc.

Instead, to do a full restore of your Mac you need to boot into macOS Recovery and use the Restore from Time Machine Backup utility. 

You may find the following Apple Support resources helpful:


About macOS Recovery
How to move your content to a new Mac
How to use Time Machine to back up or restore your Mac