All 270 Apple stores in the United States are open for business on Monday, a company spokesperson confirmed.

It's the first time that all U.S stores are open since Apple started closing stores in response to the COVID-19 pandemic last spring.

The reopening of Apple's last closed U.S. locations in Texas on Monday marks a milestone as the United States begins to emerge from lockdowns as new cases fall and vaccines are distributed.

Not all Apple stores in the U.S. are fully open for walk-in customers to go inside and browse, however. Customers should check Apple's website before heading to their store in case it is appointment-only or service is limited in other ways.

Last year, on March 13, Apple announced it was closing all of its stores outside China as the coronavirus pandemic started to pick up around the world. At the time, the closings were only scheduled through March 27, although it soon became clear that the lockdowns would stretch for months.

Since that first announcement, Apple has proactively reopened and reclosed locations around the world in response to COVID-19 conditions, often deciding to temporarily close a store ahead of official government restrictions.

In response to the pandemic, Apple experimented with new store services, including appointment-only service or shopping, and an "express pickup" option that gets customers in and out quickly. Apple also started to require masks in-store, and implemented health and safety guidelines that included reduced occupancy.

Around the world, 12 Apple stores in France and two stores in Brazil are still closed. Two stores in Mexico reopen on Tuesday.

9to5Mac first reported the milestone that all U.S. Apple stores were open.

Apple has not had issues selling its products while its stores have been closed, especially through its online store, which has been open. However, Apple CEO Tim Cook said recently that its holiday quarter could have been even bigger if its physical stores had been open.

Although the pandemic appears to be slowing down in the U.S. and businesses are reopening, the country is still recording at least 67,300 new cases of COVID-19 and at least 2,010 deaths each day, according to a seven-day average calculated by CNBC using Johns Hopkins University data.

However, vaccines continue to be administered at a blistering pace, raising hope that business could return to normal later this year. 49.8 million people have received at least one dose of a COVID-19 vaccine, according to the CDC.