Apple releases MacBook Pro Supplemental Update for 15-inch MacBook Pro; resolves T2 security chip firmware issue

“Following last week’s release of macOS 10.14.5, Apple today has released a supplemental update for certain MacBook Pro users,” Chance Miller reports for 9to5Mac. “Apple says today’s update resolves certain issues with the T2 Security Chip.”

The MacBook Pro Supplemental Update addresses a firmware issue affecting 15-inch MacBook Pro computers with T2 Security Chip, and is recommended for all users. — Apple Inc.

Miller reports, “You can download the macOS Mojave 10.14.5 supplemental update for MacBook Pro through Apple’s support webpage or through System Preferences on your Mac.”

Read more in the full article here.

MacDailyNews Take: May the MacBook Pro Supplemental Update cure all of your T2 Security Chip issues, 15-inch MacBook Pro users!


  1. I haven’t been comfortable with my 2018 MBP 15” since I got it because of this T2 chip. I have always had proper backups over the years, thankfully! But now I don’t know if I can count on them or not. Between T2 and APFS, I guess I just don’t know what I don’t know. As usual, this was poorly explained by Apple. The Super Duper and Carbon Copy Cloner websites have multiple pages trying to figure it out, explain it and make it work with their software. It is always telling of problems when these two sites have released multiple version updates. What about Time Machine and File Vault in the midst of all this? Time Machine and system snapshots? Have you tried to delete a file from your computer AND all TM backups lately? Good luck!

    Is this why Apple didn’t include the T2 chip on the newly updated iMacs?

Reader Feedback

This site uses Akismet to reduce spam. Learn how your comment data is processed.