The Cupertino-based firm is instructing users to download Oracle's version of the software in its place, but has offered no explanation for the move.
Sophos security researcher Paul Ducklin speculates that Apple made the switch for security reasons, as Oracle is renowned for its swift and frequent Java updates.
"After you apply the latest OS X Java update - which you only need if you have already chosen to install Java - you will no longer be able to run applets in your browser," he wrote in a blog post.
"That may sound like a bug, but for most users, it's a feature. You'll soon find out if you really need Java in your browser, because Apple adds a placeholder plug-in that fills any applet window with a 'Missing Plug-in' warning and a download button.
"You can then choose whether to install the missing plug-in or to learn to live without it."
Earlier this year, the Flashback Trojan malware was reported to have infected some 600,000 Apple Macs after exploiting a vulnerability in Java code.