Use excel.
My Topps cards file has 12 worksheets, a couple of them have nearly 30,000 lines of info (one for each card), with as many as 12 columns of info per card I make changes to it in moments.
I have various other files helping me to keep track of various things, and all of them have multiple pages with many thousands of rows.
Sounds like "Numbers" isn't much of a spreadsheet program.
Doug
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