macOS Catalina 10.15 Supplemental Update Re-Released as (19A603)

Apple Re-Released macOS Catalina 10.15 Supplemental Update (19A603)

In another surprise today Apple re-released the Supplemental update for macOS Catalina 10.15. Many MacAdmins are scratching their heads wondering what this update is. Let’s get right into it.

10.15.0 (19A602)

• Update Size 984.4mb
• BridgeOS Version 17.16.10572
• Original Patch Notes
• Product ID = 061-18879

10.15.0 (19A603)

• Update Size 985.4mb = 1mb Larger
• BridgeOS Version 17.16.10572 = Same
• Patch Notes = Same
• Product ID = 061-18879 = Same

Will the Re-Released Update (19A603) show up in Software Update for (19A583) Users?

Yes

Will the Re-Released Update (19A603) show up in Software Update for (19A602) Users?

No

BridgeOS update

BridgeOS was NOT updated in the Re-Released Catalina Supplemental Update (19A603). It shows as Build Version 6.

New and Previous Build Versions of 10.15

• 10.15.0 = (19A603) October 21st 2019
• 10.15.0 = (19A602) October 15th 2019
• 10.15.0 = (19A583) October 7th 2019

If I deployed/cached the old 10.15 (19A602) Installer.app for OS Upgrades, do I need to redeploy?

Do I have to replace my deployable 10.15 Installer.app? – Probably Not

If you deployed the old version of the 10.15 (19A602) Installer, you most likely do not need the new (19A603) Version. As noted above, Apple did not change the patch notes and did not mention any changes to this Build Version. The Update most likely has only very minor changes.

If I deployed/cached the old 10.15 (19A583) Installer.app for OS Upgrades, do I need to redeploy?

Do I have to replace my deployable 10.15 Installer.app?– Yes

If you deployed the old version of the 10.15 (19A583) Installer, you should update it to the new (19A603). If you don’t your users will have to install the New Catalina Supplemental Update after installing or upgrading.

What’s included in the Catalina 10.15 Supplemental Update?

NOTE: The patch notes for (19A602) are exactly the same as (19A603)

The macOS Catalina 10.15 Supplemental update includes installation and reliability improvements, and is recommended for all users.
This update:

• This update:
  – Improves installation reliability of ‌macOS Catalina‌ on Macs with low disk space
  – Fixes an issue that prevented Setup Assistant from completing during some installations
  – Resolves an issue that prevents accepting iCloud Terms and Conditions when multiple ‌iCloud‌ accounts are logged in
  – Improves the reliability of saving Game Center data when playing Apple Arcade games offline

10.15 Supplemental Update Links

• Catalina Supplemental Update = Will update when download link becomes available.

Security Content

This Update has no Published CVE entries.

https://support.apple.com/en-us/HT201222

Catalina Supplemental Update (19A603)

If you noticed any changes in this update please Contact Me