Click the App Store app icon, which is blue with a white "A" on it, in your Mac's Dock. It's in the upper-right side of the App Store window. Type high sierra into the search bar, then press ⏎ Return. It's to the right of the High Sierra icon. Doing so will prompt the installer to begin downloading onto your Mac. Once it does, you'll need to close it immediately. This will close the installer window. Click the blue face-like icon in your Mac's Dock. It's on the left side of the Finder window. The installer will be called "Install macOS High Sierra" or something similar and will have an image of a ridge of mountains on it. As long as the installer is present in the Applications folder, you can proceed. If the installer isn't there, try downloading High Sierra again.
افتح متجر التطبيقات على جهاز ماكنتوش. انقر على شريط البحث. ابحث عن هاي سييرا. انقر على زر التنزيل Download. انتظر لحين فتح نافذة برنامج التثبيت. استخدم اختصار لوحة المفاتيح ⌘ Command+Q عندما تفتح النافذة. افتح تطبيق الباحث. انقر على مجلد التطبيقات Applications. تأكد أن برنامج التثبيت موجود.