Statement of Direction: Recommended client for Mac 64-bit is Notes 9.0.1 64-bit
Preventive Service Planning
This technote contains IBM's Statement of Direction regarding the recommended Notes client for Macintosh 64-bit.
In the fall of 2015, IBM released a 64-bit version of IBM Notes 9.0.1. This version is the recommended version for all customers running Notes on Mac. Future fix packs (beginning with 9.0.1 FP5) will no longer ship 32-bit versions.
IBM recommends all Mac customers running Notes 9.0.1 32-bit (including fix pack releases) to uninstall Notes 9.0.1 32-bit for Mac, and instead install 9.0.1 64-bit for Mac and then also apply the latest interim fix for 9.0.1 64-bit Mac.
Q2: Will there be a 64-bit Mac version of Notes 9.0.1 Fix Pack 5 and future fix packs?
Although there will be no specific Mac 64-bit fix packs, the necessary fix content will be released as interim fixes for 9.0.1 Mac 64-bit.
Q3: Why is Notes 9.0.1 Mac 64-bit better than Notes 9.0.1 32-bit?
32-bit applications can address only 4GB of memory and the 4GB is shared with the kernel's own 4GB space. In more recent OS X versions, memory consumption has increased due to items such as new font families. When Notes processes reach the memory limits of a 32-bit app, crashes and high CPU utilization can occur due to memory cache constraints.
Many of the 32-bit dependencies have been deprecated by Apple. Most notably, the 32-bit JRE that Notes relies on has been deprecated by Apple. Many of the 32-bit Apple APIs have also been deprecated, and it is Apple's recommendation to move to 64-bit.
All computers running the supported versions of OS X are 64-bit capable. This allows IBM Notes to use the latest APIs and JVMs (like Oracle JRE 1.8) available for OS X, which maximizes performance and efficiency.
Q4: IBM Notes 9.0.1 Mac 64-bit supports only OS X 10.11 & 10.10. What do I do if I am on an earlier release?
We recommend you upgrade to OS X 10.10 or 10.11 as those are free upgrades from Apple. There is nothing to prevent Notes 9.0.1 Mac 64-bit from functioning under earlier versions such as OS X 10.9, but the official statement of support is for OS X 10.10 and 10.11.
IBM's statements regarding its plans, directions, and intent are subject to change or withdrawal without notice at IBM's sole discretion. Information regarding potential future products is intended to outline our general product direction and it should not be relied on in making a purchasing decision. The information mentioned regarding potential future products is not a commitment, promise, or legal obligation to deliver any material, code, or functionality. Information about potential future products may not be incorporated into any contract. The development, release, and timing of any future features or functionality described for our products remain at our sole discretion.
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