Become a MacRumors Supporter for $50/year with no ads, ability to filter front page stories, and private forums.
I've seen several reviews saying about an hour.

BUT:

* Make a full backup before any major OS upgrade... and that takes time.

* Spotlight indexing continues in the background for a long time after installation. It doesn't slow anything down, but you won't get to try Spotlight right after installing.
 
Thanks for you insight on install time . I need to install on multiple machines, in a limited amount of time.

Perhaps burning it may be faster...
anyone have any idea how much space the os takes on the DVD?

Is it 2 DVD's?
anyone have an idea how long a rip/burn on a 4X DVDR would be?
 
Winstonp said:
Thanks for you insight on install time . I need to install on multiple machines, in a limited amount of time.

Perhaps burning it may be faster...
anyone have any idea how much space the os takes on the DVD?

Is it 2 DVD's?
anyone have an idea how long a rip/burn on a 4X DVDR would be?

Theoretically, if you need to install in a rush, you could keep the install volume on an external hard disk (such as an iPod). Firewire transfer rates are faster than optical transfer rates. Check the stickied thread in this forum to see how to do that.
 
Scrap the languages

I ended up installing three times (Note: scrap any Mail plug-ins before the install, and do an archive and install rather than an upgrade. And back everything up!), and I finally noticed on the third install that there is an option to not install all the languages (I don't know if this was always there on previous installs), but just installing 1 language cut the install time in half (about 15 min) and saved a gig of space.
 
Register on MacRumors! This sidebar will go away, and you'll see fewer ads.