You can easily make a bootable USB drive using these instructions: How to create a bootable installer for macOS - Apple Support How to download tensorflow mac.
https://nameonly.weebly.com/hdtracks-download-manager-mac-crashes.html. Jul 31, 2020. And if your Mac is experiencing problems, a bootable installer drive makes a handy emergency disk. Macworld also has bootable-install-drive instructions for Mavericks (OS X 10.9), Mountain Lion. https://keentp954.weebly.com/configure-pioneer-ddj-rx2-for-djay-pro-windows.html.
It's a bit more flexible than using the recovery partition, in my opinion. You get access to the same Utilities, but without having to download the macOS every time you need to restore the system. To boot from the USB drive use these instructions: https://support.apple.com/en-ca/HT202796
In addition, as your laptop is a 2011 model, I'd recommend using one of the previous macOS versions (say, El Capitan or Sierra), instead of High Sierra. You'll have to make a bootable USB drive for that particular version of macOS, then.
Os X Recovery Disk
Mac Recovery Disc
Create Apple Recovery Disk
Synergy 1.8 8 dmg. Also, take note that a Time Machine backup made using High Sierra won't work with previous macOS versions, so be extra careful in this regard in order not to lose data.