Adobe Applications and 64-Bit Compatibility
According to Apple, macOS High Sierra “will be the last macOS release to support 32-bit apps without compromise.” With the release of macOS High Sierra 10.13.4, Adobe customers might be prompted with a new notification when launching Adobe applications. (“<Application Library Name> may affect the performance of your Mac. The developer of this app needs to update it to improve its compatibility.”)
You can safely ignore these notifications and keep using your Adobe applications normally. The messages will stop appearing after the first few launches.
Here’s a sample screenshot of one of those notifications:
On their developer news and updates page, Apple explained in June 2017 that macOS High Sierra “will be the last macOS release to support 32-bit apps without compromise” as they are preparing to deprecate 32-bit software on their future OS releases.
Adobe applications and 64-bit compatibility
Adobe applications such as Photoshop, Illustrator, InDesign, and Premiere Pro have moved their core codes to 64-bit starting in 2008. We are working to update shared components, including our application licensing technology. In the meantime, the best way for Adobe customers to minimize the frequency of these notifications is to install all Adobe-provided updates — this will ensure they are running the latest versions of both the Adobe applications and the Adobe shared components.
You can expect more news and updates from Adobe regarding this topic in the upcoming months, and, in the meantime, we thank you for your patience.