Startup crash after update ( Mac OS 10.6.8 Java 6 )

Licenced game not started after update to version 1.12.1
Logs in attachments
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Exception in thread "main" java.lang.UnsupportedClassVersionError: net/minecraft/client/main/Main : Unsupported major.minor version 52.0

[11:57:41 ERROR]: Game ended with bad state (exit code 1)
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Please don't propose Java8 !
Can't UPDATE to JAVA8 (macos 10.6.8 unsupported)
Is it only ver 1.11.2 available to this system?