Parallels Desktop 12 , how to install OS X 10.9

[AlainD1]

Hello to all,
On my MBP 2016 I would like to install and Old Mac OS ... 10.9.5 Maverick, I use a startup USB drive made on my old macbook Pro 2012

but after the installation starts I get an alert :
Impossible de vérifier cette copie de l'application Installer OS X Maverick. ... in French
Impossible to verify this copy of the application 'Installer OS X Maverick'. ... my be in English

Do I have to go back to an older system, and upgrade then to 10.9 ? I have an old dvd of Panther
Or is there an other solution ?
Thanks.

 

[PaulChristopher@Parallels]

Hi AlianD1, the best option would be download an installation file for Mavericks and install it on top of Parallels Desktop. Please check out this article to know the manual installation.