Apple 一直鼓勵 Mac 電腦用家升級到最新版的 macOS，近幾年更把 macOS 變為免費下載，令更多用家可以毫無顧慮享受新 macOS 帶來的新功能。
大家可能會發現，在新版 macOS 推出後，Apple 就會把舊版 macOS 從 Mac App Store 中抽起，例如在最新 macOS Mojave 推出後，舊版的 macOS High Sierra 就會被消失，其它更舊的 macOS 例如 Sierra 或 El Capitan 等，也在新 macOS 推出後就被消失。
假如你正在使用較舊的 macOS，錯過了上幾代的更新，最近又剛好購買了新的軟體（例如 Adobe CC 2018）或硬體（iPhone XS），你可能會發現正在使用的 macOS 實在太舊，必需稍稍升級 macOS 才能順利操作，卻又發現自己的電腦並不兼容 macOS Mojave，是否就沒法退一步安裝 High Sierra、Sierra、El Capitan 等操作系統呢？
其實 Apple 在 Mac App Store 仍然保留有 High Sierra、Sierra、El Capitan 這些舊版 macOS，只是把它隱藏起來，在 Apple 的支援網頁中有提供 Mac App Store 相關連結，有需要的朋友可自行下載。
macOS High Sierra 支援網頁
Do you understand there is a 12 word phrase you can communicate to your man... that will induce deep emotions of love and instinctual attractiveness to you deep inside his heart?
回覆刪除That's because deep inside these 12 words is a "secret signal" that fuels a man's instinct to love, cherish and care for you with his entire heart...
12 Words Who Trigger A Man's Desire Impulse
This instinct is so hardwired into a man's genetics that it will make him try harder than ever before to take care of you.
In fact, triggering this powerful instinct is so important to achieving the best possible relationship with your man that once you send your man a "Secret Signal"...
...You will immediately notice him open his heart and soul for you in a way he's never expressed before and he'll recognize you as the only woman in the world who has ever truly tempted him.