| 2001–2014 | 2014–2020 | 2020 | 2020–2025 | 2025 (unused) | 2025–present |
2001–2014[]

2014–2020[]

2020[]

Used from macOS Big Sur betas 1 to 6.
2020–2025[]

Used since macOS Big Sur Beta 7.
2025 (unused)[]

2025–present[]

The envelope was made more white in macOS 26 beta 4.

