To do Alt + H L C on Mac in Excel, download and install Accelerator Keys, then press Option, followed by H, L, and C.
Command: Clear Rules Menu
This is how to do Alt + H L C on Mac in Excel with Accelerator Keys, the native ribbon and alt key shortcut solution for Mac users who get more done with Excel.
Alt + H L C opens the Clear Rules submenu within Conditional Formatting. From here you can clear conditional formatting rules from Selected Cells (S), the Entire Sheet (E), This Table (T), or This PivotTable (P). This is essential for removing unwanted formatting rules without affecting your underlying data.