So, to answer your question, Roblox can potentially harm your Macbook Air since Macbook Airs were not really designed for resource-intensive tasks. You may be wondering if Roblox will run on Macbook Air. This youtube video shows that it does You have to weigh the risk though. If you want to risk it, you can try. I suggest a Macbook Pro though.
Method 2 Method 2 of 4: Installing Roblox on Mac OS X
Go to http://www.roblox.com from your school computer's web browser. [Link goes to roblox's official website.] Tap on any game you want to play. It will load and show the icon saying [download and install roblox] (it will install roblox player.)
Note: The Roblox website supports the following browsers for Mac: Chrome, Firefox, and Safari. Linux: Roblox is not supported on Linux. Mobile: Click here for system requirements for Roblox Mobile. Chrome OS: Chrome OS version 53 or above is required, and you must first enable Google Play Store on your device.
Mac: Roblox Client will install on 10.7 (Lion) and higher whereas the Roblox Studio will install on Mac OS 10.11 (El Capitan) and above. Note: The Roblox website supports the following browsers for Mac: Chrome, Firefox, and Safari. Linux: Roblox is not supported on Linux. Mobile: Click here for system requirements for Roblox Mobile.
Graphics Card: On PC/Windows, the Roblox application requires DirectX 10 or higher feature level support. For the best performance we recommend either a computer less than 5 years old with a dedicated video card, or a laptop less than 3 years old with an integrated video card.
Linux: Roblox is not supported on Linux. Mobile: Click here for system requirements for Roblox Mobile. Chrome OS: Chrome OS version 53 or above is required, and you must first enable Google Play Store on your device. Note: Roblox video recording feature only works on Windows 7, Windows 8/8.1 and Windows 10. Newly released operating systems ...
Note: Roblox video recording feature only works on Windows 7, Windows 8/8.1 and Windows 10. Newly released operating systems or pre-released versions of operating systems may not immediately be supported.
According to a help article, these are the currently supported devices and required operating systems for a mobile device running Roblox: Apple iOS: iPad 2 or higher, iPhone 4s or higher, and iPod touch 5th Generation. iOS 9 or greater is required. Android: The Roblox application supports Android OS 5.0 and higher.
Android: Android 5.0 or later is required. Internet requirements. Roblox requires a minimum of a 4-8 Mb/s internet connection. If you experience problems and are currently connected to your phone company's 3G or 4G network, please try connecting through WiFi instead for a faster and more stable connection.
Play Sound. Roblox runs well on most modern computers, but performance will be dependent on the game that the user is playing. Things like part count, graphics settings, and others will play a role in the performance of the game.
For Windows 8/8.1 you will need to run Roblox in Desktop Mode, as Metro Mode (the tiled start-screen) is not currently supported. Mac: Roblox Client will install on 10.7 (Lion) and higher whereas the Roblox Studio will install on Mac OS 10.11 (El Capitan) and above.