"y" with accent

I don't think the MacOS version of US International PC was ever able to make y acute. At least mine from a few years ago does not, only y umlaut. ABC Extended can make it. Or you could add this to a custom version of US International PC with Ukelele. Or make a text replacement in system preferences > keyboard > text > replace with.

See also

https://apple.stackexchange.com/questions/314902/how-to-use-windows-us-intl-keyboard-layout-on-a-mac

DrJulio wrote:

In the US-International keyboard layout, "y" can receive accent after hitting the dead key acute ('+y = ý). This works in PCs and, I believe, used to work in macs too. However, that is not the case anymore: "ÿ" can be typed, but "ý" cannot. Is there any reason for this, and could it be added?

See if this gets you any closer—

Activate Extended Keyboard

https://sites.psu.edu/symbolcodes/mac/codemacext/#activate

DrJulio wrote:

I just checked (Windows 10 v.21H2), and the dead key (apostrophe) plus "y" produces y-acute. I think it was already included in Windows XP -- I used it back then when I wrote my dissertation on Old Castilian lit.

Thanks, good to know. I guess the MS web page is wrong.

This page seems to indicate that the Windows version doesn't do y acute either.

https://docs.microsoft.com/en-us/globalization/keyboards/kbdusx