Thank you Nancy for your detailed response. I changed all settings to match yours, ran 1 report, closed out, logged back in and ran the report again. I was so hopeful but here is the result. 
Might a saved .PDF file look any differently than the onscreen preview emulator? Perhaps changing paper size, orientation or font choices might alter the presentation and give a hint. Seems like I also remember some issue when a person had multiple spouses or something, but can’t recall.
Do other charts… save to .PDF ? A restart would definitely be in order. Maybe even reboot your computer if it continues.
any chance you still have RM 10 or a RM 10 backup that you could download RM 10 again and install-- if you can see the RM 10 report, I would check to see if the settings are different-- @kbens0n is correct that if the person has 2 or more marriages, this will cause a problem and I think it has been reported to development
Yes, I had tried to save to PDF. I restarted as you suggested and it saved but it didn’t look any different than the onscreen preview emulator.
The people in my Hourglass Chart go back to the 1700’s and a few had multiple spouses since many died in childbirth. In RM 10 that was not an issue and only the relevant ancestral spouse would show.
Sorry to hear that. I’ve been assuming that the issue is mac specific because we see the same default behavior, but changing the fill and line color settings to white makes the chart readable for me. It seems like changing the color to white has no effect for you as the bars and lines remain that same blue-grey color.
Until development publishes a fix, perhaps RM support or someone who does not have the issue could run the report for you. I’d be happy to give it a go if you want to go down that path.
@Runner As I said, you and I seem to have the exact same setting EXCEPT for those I pointed out–BUT when you look at my chart and yours, they are drastically different-- I have boxes around my people and you do NOT-- so I was wondering what was the difference..
Playing around with the settings I was able to go from my view
to basically something similar to your view
So what was the difference between the 2-- a setting under Box Border which says Indented Corners on the 1st page and I changed to NONE under the 2nd page–on the 1st one that is RIGHT it said INDENTED CORNERS
Have you opened a support ticket to see if the agent gets the same problem generating the chart? That would at least tell us if it’s an issue with settings or data or something on the computer triggering it.
Thank you, Renee. I reported it back in September 2025 (see my post above) but will report it again. If anyone else has this problem I hope they report it as well to gain some fresh attention to this issue.
Many thanks to all who have tried to help!
I am confident that if you install on 2nd computer and use same database it likely work correctly at least that was my experience in past (for W11orW10)
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Renee, here is an update.
I opened a support ticket, sent a backup file and screenshots.
The agent was able to recreate the same issue generating both the Hourglass and Ancestor Charts on a Mac Mini Tahoe.
The agent stated she reported the issue and forwarded my file to her supervisor so that development can review it.
so the issue seems to be specific to Mac Mini Tahoe (and maybe no Windows?)
And on my system: iMac, Tahoe 26.3.1 (a) with RM 11.2.0.0. I have no idea about Windows.
I have not seen that issue on windows on my computer