Apple has has posted two new Java update patches, targeting Mac OS X Leopard and Tiger, respectively. The Leopard patch, Update 4, is said to improve the "reliability, security and compatibility" of Java by updating Java SE 6 to 1.6.0_13, J2SE 5.0 to 1.5.0_19, and J2SE 1.4.2 to 1.4.2_21. Mac OS X 10.5.7 is required, and Java SE 6 is only functional on Intel Macs, due to particular 64-bit code. The file is 158MB.

The 80.11MB Tiger patch is labeled Release 9, but offers similar fixes. J2SE 5.0 is upgraded to v1.5.0_19, while J2SE 1.4.2 migrates to v1.4.2_21. With either of the new Java distributions, Apple warns that all web browsers must be closed before installation.