Build errors: ./rendering/RenderThemeMac.mm:2732:27: error: class method '+_imageWithSystemSymbolName:' not found (return type defaults to 'id') [-Werror,-Wobjc-method-access] auto image = [NSImage _imageWithSystemSymbolName:@"arrow.down.circle"]; ^~~~~~~~~~~~~~~~~~~~~~~~~~ ./rendering/RenderThemeMac.mm:2732:5: error: 'auto' deduced as 'id' in declaration of 'image' [-Werror,-Wauto-var-id] auto image = [NSImage _imageWithSystemSymbolName:@"arrow.down.circle"]; ^~~~~~~~~~ ./rendering/RenderThemeMac.mm:2738:9: error: use of undeclared identifier 'NSImageHintSymbolFont' NSImageHintSymbolFont : [NSFont systemFontOfSize:32], ^ ./rendering/RenderThemeMac.mm:2739:9: error: use of undeclared identifier 'NSImageHintSymbolScale' NSImageHintSymbolScale : @(NSImageSymbolScaleMedium) ^ ./rendering/RenderThemeMac.mm:2739:36: error: use of undeclared identifier 'NSImageSymbolScaleMedium' NSImageHintSymbolScale : @(NSImageSymbolScaleMedium) ^ 5 errors generated.
Created attachment 404141 [details] Patch
Created attachment 404142 [details] Patch
Created attachment 404150 [details] Patch
Created attachment 404151 [details] Patch
Linked this up to https://bugs.webkit.org/show_bug.cgi?id=214396, which should be enough to get WebKit to build for Big Sur with the Seed 1 SDK.
Looks like https://bugs.webkit.org/show_bug.cgi?id=214396 will fix this, closing this one, thanks! *** This bug has been marked as a duplicate of bug 214396 ***