@TP-Link_Deco , re-downloaded the tool, as suggested, and retried updating.....succesfully. Thanks for helping out, finally my mesh-network up to date. looking forward to a stable and more...

@TP-Link_Deco , @Kevin_Z I have tried, tried and then tried once more to upgrade my Deco 9 V2, using my MacBook Pro late 2013 running OS X Catalina 10.15.6. Since this machine does not have an...