How to enable a Hebrew keyboard
Add a Hebrew input source once, and every app on the device can type it. Steps for macOS, Windows 11, iOS, Android and Chromebook.
The layout
This is the real Israeli standard layout (SI 1452) that "Hebrew" adds on every platform below.
Add it on your platform
macOS
System Settings › Keyboard › Input Sources › Edit. Click the + button, find Hebrew in the list (it appears under Hebrew, not under a region), and add it. If both "Hebrew" and "Hebrew – QWERTY" are offered, add whichever layout matches how you plan to type; see the FAQ below for the difference.
Switch input sources with Control+Space, or by clicking the input menu in the menu bar once more than one source is added.
Windows 11
Settings › Time & language › Language & region. Add a language, search for Hebrew, and add it; Windows installs the Hebrew keyboard layout with it. Under that language's "..." menu, "Language options" lets you add an additional keyboard if more than one Hebrew layout is available.
Switch with Windows key+Space, or the language indicator in the taskbar.
iOS (iPhone and iPad)
Settings › General › Keyboard › Keyboards › Add New Keyboard, then choose Hebrew. iOS offers a standard Hebrew keyboard; check the same screen for a QWERTY variant if you'd rather type phonetically.
Switch keyboards with the globe icon on the on-screen keyboard, or by holding it down to pick from a list.
Android (Gboard)
In Gboard: Settings › Languages › Add keyboard › Hebrew. Other keyboard apps have an equivalent language list in their own settings. Android's system settings (Settings › System › Languages & input) can also add Hebrew as a language, which most keyboard apps then pick up.
Switch by tapping the globe or space-bar language switcher on the keyboard itself.
Chromebook
Settings › Advanced › Languages and inputs › Inputs › Add input methods, then find Hebrew. Switch with the input-method key in the shelf, or the keyboard shortcut set in the same settings page.