Identify Yosemite version of USB installer?

[DEMinSoCAL]

I've made bootable USB installers from various versions of the Yosemite installer from the App Store over time. It's my understanding when I upgrade a Mac, the store always downloads the latest Yosemite available at the time so I know my sticks have 10.10.2 or .3 or .4, but don't know which are which.

Is there some way of identifying which subversion of Yosemite that stick has?

 

[Synchro3]

Just checked the OS X Installer apps (start app -> about OS X installer):

OS X Installer 10.10.0 has version number 1.6.5 (1012)
OS X Installer 10.10.1 has version number 1.6.7 (1014)
OS X Installer 10.10.2 has version number 1.6.10 (1017)
OS X Installer 10.10.3 has version number 1.6.16 (1023)
OS X Installer 10.10.4 has version number 1.6.30 (1040)

 

[DEMinSoCAL]

Thank you, Synchro3, for the info.

 

[Synchro3]

You're welcome.

 

[mikeboss]

or, boot the stick and start the terminal. enter "sw_vers" hit enter. this will give the OS version and build number. or insert the stick in a Mac and start System Preferences. go into Startup Disk. this also will show version (and build number if you hover the mouse pointer over the stick's icon).

 

[DEMinSoCAL]

Do you know if I can just copy the most current "Install OS X Yosemite" file onto the other (older) Yosemite bootable USB sticks and overwrite the existing file, or do I have to reimage the most current stick onto the others?

I'm not sure if there is anything special about the "boot loader" amongst the various versions of Yosemite.

 

[DEMinSoCAL]

or, boot the stick and start the terminal. enter "sw_vers" hit enter. this will give the OS version and build number. or insert the stick in a Mac and start System Preferences. go into Startup Disk. this also will show version (and build number if you hover the mouse pointer over the stick's icon).

Even easier, I can just do a "get Info" on the installer file and it tells me the correct version number.