According to openhab tutorial they said that openhab developers should use JDK 8 - 32 bit for Mac OSX, How can I install JDK 8 - 32 bit, the only available version of JDK 8 is 64 bit !
I believe you have misread the documentation. This page notes that you must use 32-bit Java on ARM chips, rather than 64-bit.
Please use the 32-bit version of the JVM for ARM platforms, even on 64-bit operating systems. Serial connections won't work with a 64-bit JVM, preventing bindings like Z-Wave from functioning.
ARM chips are used in many of the home automation devices and used in computers such as the Raspberry Pi. But ARM chips are not used in Macs, which currently use 64-bit Intel Core chips.
According to this Question, Java apps are agnostic regarding their host OS being 32-bit or 64-bit. Only native-code libraries called from Java may care about 32/64 bits of the host OS.
I’m not a user of OpenHAB, so I’m not certain
I give up… Stack Overflow is losing my edits.