I'm in the process of moving from a 10.7.5 iMac to a brand new iMac with 10.8.3. Using a Time Machine backup.
I installed Java Version 7 Update 21 from Oracle (same as had been installed on the "old" iMac. How come it didn't come over to the new Mac in the backup??? Hmmm...) (I know! I know! it's because I didn't restore system info, just user profile...)
Tried launching an app that uses Java and it launched and ran fine.
Tried launching TD Ameritrade's Thinkorswim app, which I use extensively every trading day and it gives me a weird msg:
My understanding (Oracle web site) is that you can't have both Java 6 and 7 installed at the same time.
However, Oracle also says that Java 6 is dangerous and that it's preferable to install Java 7...
So... What should be the next step???
The Oracle Java 7 runtime is a web plugin only. To run standalone Java applications, you need the Java 6 runtime distributed by Apple. That's what you're being prompted to download. Both can be installed at the same time.