You can remove programs' windows by clicking the red circle in the top-left corner of a window; however, to fully quit a program on a Mac, you'll need to do the following:   Control-click the program's app icon in your Mac's Dock. Click Quit in the pop-up menu. If a program won't close, you can force it to quit by doing the following:  Open Spotlight. Type in activity monitor, then double-click Activity Monitor. Select a program to quit on the CPU tab. Click the X in the top-left corner of the program's window, then click Force Quit. Start-up programs are programs which start when you boot up your computer. This can both make your computer's start-up process slower than necessary and crowd your computer's RAM. To disable these programs, do the following:  Open the Apple menu. Click System Preferences.... Click Users & Groups, then click your username on the left side. Click Login Items. Uncheck the box next to every item you don't want starting when you turn on your Mac. You may first have to click the lock icon in the bottom-left corner of the window and then enter your password before you can uncheck items. While Safari is considered the best fit for browsing on a Mac, Google Chrome and Firefox are both fast browsers which may cause your computer to use less RAM. se Terminal to purge your current RAM cache. This is a trick that can clear some RAM space:  Open Spotlight. Type in terminal, then double-click Terminal in the drop-down results. Type in sudo purge, then press ⏎ Return. Enter your password if prompted, then press ⏎ Return. As long as you've disabled the start-up programs you want to avoid, restarting your Mac may prevent excess RAM from being used after rebooting:  Click the Apple menu. Click Restart.... Click Restart when prompted.
किसी भी ऐसे प्रोग्राम जिसकी आवश्यकता न हो उसे बंद कर दीजिये: जिद्दी प्रोग्राम्स को फ़ोर्स-क्लोज़ (Force-close) करिए: अनावश्यक स्टार्ट-अप प्रोग्राम्स को डिसेबल (disable) करिए: अगर ज़रूरी हो तो अधिक एफ़िशेंट वेब ब्राउज़र पर स्विच कर जाइए: अपने वर्तमान रैम कैशे (cache) को पर्ज (purge) करने के लिए Terminal का इस्तेमाल करिए: अपने कंप्यूटर को फिर से स्टार्ट करिए: