Xcode 26.4 is missing the documentation for Foundation

Developer Tools & Services Xcode
g_i_i_k OP
Created 3d
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Boosts 3
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Upgraded to Tahoe 26.4 and Xcode 26.4 and realized Xcode is missing the documentation for Foundation. Occasionally, if other (not yet missing) documentation references a Foundation entity, such as a type, clicking on it may open in a web browser pointing to the externally hosted Apple documentation.

Anyone else experiencing this or have a workaround (perhaps the documentation files are on disk but were somehow lost / disconnected from the Xcode doc browser)?

I checked the release notes for 26.4 and for 26.3 but did not find a mention of anything like that.

Filed an issue with Apple, please do too if you are affected so hopefully it will see some love and lead to restoring the documentation.

Edited: found some possibly related files in my ~/Library and the newer version v302 (26.4 related, I think, is considerably smaller):

du -sh ~/Library/Developer/Xcode/DocumentationCache/* | awk -F/ '{print $NF "\t" $1}'
v296	1.0G
v302	507M
Answered by nckh in 882565022

Seems to be fixed in Xcode 26.5 beta 1 :)

Replies  5
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DTS Engineer OP
Apple
2d
Filed an issue with Apple

What was that bug number?

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Quinn “The Eskimo!” @ Developer Technical Support @ Apple
let myEmail = "eskimo" + "1" + "@" + "apple.com"

0
DTS Engineer OP
Apple
1d

FB22362166

Thanks!

AFAICT this is Just A Bug™. I’m seeing a similar issue with my Xcode 26.4 install (a public release of Xcode 26.4 running on a public release of macOS 26.3.1). I suspect it’s due to the recent work to synchronise documentation between Apple > Developer and Swift > Documentation. However, we won’t know for sure until your bug has had more chance to find its way through our systems.

ps It’s better to reply as a reply, rather than in the comments; see Quinn’s Top Ten DevForums Tips for this and other titbits.

Share and Enjoy
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Quinn “The Eskimo!” @ Developer Technical Support @ Apple
let myEmail = "eskimo" + "1" + "@" + "apple.com"

1
nckh OP
1d

Any ETA of when this can be fixed, please? Because of that issue, Dash cannot parse the full documentation either, which is slowing me down considerably. Thanks for your work!

2
nckh OP
11h
Recommended

Seems to be fixed in Xcode 26.5 beta 1 :)

0
DTS Engineer OP
Apple
7h
Seems to be fixed in Xcode 26.5 beta 1 :)

Yay!

Thanks for the heads up, and also for testing with Apple’s beta seeds.

Share and Enjoy
—
Quinn “The Eskimo!” @ Developer Technical Support @ Apple
let myEmail = "eskimo" + "1" + "@" + "apple.com"

0
Xcode 26.4 is missing the documentation for Foundation
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