# Recent upgrade to MACOS Monterey and Stacks 4.2.2 not installed

**URL:** <https://forums.realmacsoftware.com/t/recent-upgrade-to-macos-monterey-and-stacks-4-2-2-not-installed/41376>\
**Category:** RapidWeaver Classic\
**Created:** [November 16, 2021, 2:23am UTC](https://forums.realmacsoftware.com/t/recent-upgrade-to-macos-monterey-and-stacks-4-2-2-not-installed/41376 "2021-11-16T02:23:57Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![BEL01](https://dub1.discourse-cdn.com/flex005/user_avatar/forums.realmacsoftware.com/bel01/32/17335_2.png) [@BEL01](https://forums.realmacsoftware.com/u/BEL01)\
**Post date:** [November 16, 2021, 2:23am UTC](https://forums.realmacsoftware.com/t/recent-upgrade-to-macos-monterey-and-stacks-4-2-2-not-installed/41376/1 "2021-11-16T02:23:57Z")

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Error message states Stacks not installed  
Anyone come across this before please?  
Is it a case of simply re-installing or is there an update to Stacks somewhere?

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**Author:** ![davidefan](https://dub1.discourse-cdn.com/flex005/user_avatar/forums.realmacsoftware.com/davidefan/32/24469_2.png) [@davidefan](https://forums.realmacsoftware.com/u/davidefan)\
**Post date:** [November 16, 2021, 5:30pm UTC](https://forums.realmacsoftware.com/t/recent-upgrade-to-macos-monterey-and-stacks-4-2-2-not-installed/41376/2 "2021-11-16T17:30:43Z")

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Probably just re-install the stack and make sure you re enter the serial number. I helped someone else a few days ago with the same issue.

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**Author:** ![system](https://dub1.discourse-cdn.com/flex005/user_avatar/forums.realmacsoftware.com/system/32/25301_2.png) [@system](https://forums.realmacsoftware.com/u/system)\
**Post date:** [December 17, 2021, 3:31am UTC](https://forums.realmacsoftware.com/t/recent-upgrade-to-macos-monterey-and-stacks-4-2-2-not-installed/41376/3 "2021-12-17T03:31:03Z")

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