Practice mode · free · unlimited · not certifiable
Finder and Files
Unscored tasks with hints and instant feedback. Practice results never become credentials.
Short lesson
macOS keyboard essentials · 6 min
Cmd+Space Spotlight · Ctrl+↑ Mission Control · Cmd+` cycle windows · Cmd+Shift+. hidden files · Cmd+Option+Esc force quit.
L1Tag client invoicesossim
Add the tag “Invoice” to every PDF in Documents/Invoices that belongs to ACME. Do not tag other files.
Sign up to practiseL3Smart Folder for recent invoicesossim
Create a Smart Folder named “Recent Invoices” that finds PDFs tagged Invoice modified within the last month.
Sign up to practiseL3Batch rename in Finderossim
Select the three October invoice PDFs and the September one and rename them with Finder's batch rename so their names start with “2026-” (for example 2026-acme-oct.pdf). Leave old-2025.pdf alone.
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