Has anyone here actually tried this or is everyone just guessing?
Click on the pdf manual for Mac.
Mac PFD Manual 2018 In the Chrome browser (my default) it opens up 438 pages—not quickly but it does.
Command f lets you search all 438 pages just like it's supposed to.
I click Print (to pdf) and it saves the manual to my folder of choice. You may have to right-click and Save As depending on your browser and preferences. Ok... I open it up—it defaults to Preview. Type in the search term and it will display all pages on the right.
It behaves exactly like every PDF file I know.
I work with, download and/or generate 10–50 .pdf files a day. The 2018 BIAB manual for the Mac behaves no differently. The reason I use Chrome is because, in the past, I could search 800 page pdf files from a certain state web site in the time it took to type in the search term. While Chrome took a few seconds, with FireFox, the same file could take a half hour or more. Safari and Internet Explorer were ridiculously slow.
Just for kicks, I tried downloading the manual in Safari and FireFox. Much, much better than the old days but still slower than Chrome.