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Going from 17.7.2 to 18.6 it would be 4,37 GB OTA on 12 Pro:

2025-07-29 19.22.jpg
 
iOS 17.6 beta - 17 June 2024
iOS 17.6 beta 2 - 01 July 2024
iOS 17.6 beta 3 - 09 July 2024
iOS 17.6 beta 4 - 16 July 2024
iOS 17.6 RC - 23 July 2024
iOS 17.6 - 29 July 2024

iOS 18.6 beta - 16 June 2025
iOS 18.6 beta 2 - 30 June 2025
iOS 18.6 beta 3 - 14 July 2025
iOS 18.6 RC - 21 July 2025
iOS 18.6 - 28 July 2025 [?]

iOS 17.6 RC [21G79]
iOS 17.6 [21G80]

iOS 18.6 RC [22G84]
iOS 18.6 [22G85/22G86] [?]

Releases
iOS 18.6 (22G86)
iPadOS 18.6 (22G86)
macOS 15.6 (24G84)
tvOS 18.6 (22M84)
visionOS 2.6 (22O785)
watchOS 11.6 (22U84)

Source

Just like last year, the non-beta release has a different build number compared to the RC [formerly known as GM]
 
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iOS 18.7 developer beta tomorrow and possibility of iOS 26 developer beta 5

Just checked and iOS 14.7 was the last x.7 release that went through several developer beta releases. iOS 15.7, iOS 16.7, and iOS 17.7 were all RC until the public non-beta was released.

Major focus will be on iOS 26 developer beta while minor focus will be on iOS 18.7 RC

Thanks for the correction @drak22
 
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After downloading 18.6, Siri now demands I call her WOPR, is this just a bug? Anyone else experiencing this?
 
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18.6.1 coming today.

I only used it once on my series 9 when I got covid a few years ago. The doctor told me it was quite precise.

I really haven’t missed it on my series 10 bought last year when in the US but appreciate the update nevertheless.

Will it update on iPhone and watch even if I’m not in the US currently ??
 
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macOS 15.7 will likely not come out til September alongside the '26 releases and 18.7 for iPhones that can't be updated to iOS 26.

We could see macOS 15.6.1 today though if there are bug and security fixes included in this batch of updates.
Why did they release 15.7 RC then?
 
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